AGI: Split out IIgs sound emulator into separate files.

svn-id: r49749

5 files changed, 1063 insertions, 985 deletions

diff --git a/engines/agi/module.mk b/engines/agi/module.mk
index f031834c9d..3b7741443d 100644
--- a/engines/agi/module.mk
+++ b/engines/agi/module.mk
@@ -30,6 +30,7 @@ MODULE_OBJS := \
 	predictive.o \
 	saveload.o \
 	sound.o \
+	sound_2gs.o \
 	sprite.o \
 	text.o \
 	view.o \
diff --git a/engines/agi/sound.cpp b/engines/agi/sound.cpp
index 1b76b1ee40..014a3dba1a 100644
--- a/engines/agi/sound.cpp
+++ b/engines/agi/sound.cpp
@@ -31,6 +31,8 @@
 
 #include "agi/agi.h"
 
+#include "agi/sound_2gs.h"
+
 namespace Agi {
 
 #define USE_INTERPOLATION
@@ -57,18 +59,6 @@ AgiSound *AgiSound::createFromRawResource(uint8 *data, uint32 len, int resnum, S
 	return NULL;
 }
 
-IIgsMidi::IIgsMidi(uint8 *data, uint32 len, int resnum, SoundMgr &manager) : AgiSound(manager) {
-	_data = data; // Save the resource pointer
-	_ptr = _data + 2; // Set current position to just after the header
-	_len  = len;  // Save the resource's length
-	_type = READ_LE_UINT16(data); // Read sound resource's type
-	_midiTicks = _soundBufTicks = 0;
-	_isValid = (_type == AGI_SOUND_MIDI) && (_data != NULL) && (_len >= 2);
-
-	if (!_isValid) // Check for errors
-		warning("Error creating Apple IIGS midi sound from resource %d (Type %d, length %d)", resnum, _type, len);
-}
-
 PCjrSound::PCjrSound(uint8 *data, uint32 len, int resnum, SoundMgr &manager) : AgiSound(manager) {
 	_data = data; // Save the resource pointer
 	_len  = len;  // Save the resource's length
@@ -86,208 +76,6 @@ const uint8 *PCjrSound::getVoicePointer(uint voiceNum) {
 	return _data + voiceStartOffset;
 }
 
-IIgsSample::IIgsSample(uint8 *data, uint32 len, int resnum, SoundMgr &manager) : AgiSound(manager) {
-	Common::MemoryReadStream stream(data, len, DisposeAfterUse::YES);
-
-	// Check that the header was read ok and that it's of the correct type
-	if (_header.read(stream) && _header.type == AGI_SOUND_SAMPLE) { // An Apple IIGS AGI sample resource
-		uint32 sampleStartPos = stream.pos();
-		uint32 tailLen = stream.size() - sampleStartPos;
-
-		if (tailLen < _header.sampleSize) { // Check if there's no room for the sample data in the stream
-			// Apple IIGS Manhunter I: Sound resource 16 has only 16074 bytes
-			// of sample data although header says it should have 16384 bytes.
-			warning("Apple IIGS sample (%d) too short (%d bytes. Should be %d bytes). Using the part that's left",
-				resnum, tailLen, _header.sampleSize);
-
-			_header.sampleSize = (uint16) tailLen; // Use the part that's left
-		}
-
-		if (_header.pitch > 0x7F) { // Check if the pitch is invalid
-			warning("Apple IIGS sample (%d) has too high pitch (0x%02x)", resnum, _header.pitch);
-
-			_header.pitch &= 0x7F; // Apple IIGS AGI probably did it this way too
-		}
-
-		// Finalize the header info using the 8-bit unsigned sample data
-		_header.finalize(stream);
-
-		// Convert sample data from 8-bit unsigned to 8-bit signed format
-		stream.seek(sampleStartPos);
-		_sample = new int8[_header.sampleSize];
-
-		if (_sample != NULL)
-			_isValid = SoundMgr::convertWave(stream, _sample, _header.sampleSize);
-	}
-
-	if (!_isValid) // Check for errors
-		warning("Error creating Apple IIGS sample from resource %d (Type %d, length %d)", resnum, _header.type, len);
-}
-
-/** Reads an Apple IIGS envelope from then given stream. */
-bool IIgsEnvelope::read(Common::SeekableReadStream &stream) {
-	for (int segNum = 0; segNum < ENVELOPE_SEGMENT_COUNT; segNum++) {
-		seg[segNum].bp  = stream.readByte();
-		seg[segNum].inc = stream.readUint16LE();
-	}
-
-	return !(stream.eos() || stream.err());
-}
-
-/** Reads an Apple IIGS wave information structure from the given stream. */
-bool IIgsWaveInfo::read(Common::SeekableReadStream &stream, bool ignoreAddr) {
-	top  = stream.readByte();
-	addr = stream.readByte() * 256;
-	size = (1 << (stream.readByte() & 7)) * 256;
-
-	// Read packed mode byte and parse it into parts
-	byte packedModeByte = stream.readByte();
-	channel = (packedModeByte >> 4) & 1; // Bit 4
-	mode    = (packedModeByte >> 1) & 3; // Bits 1-2
-	halt    = (packedModeByte & 1) != 0; // Bit 0 (Converted to boolean)
-
-	relPitch = stream.readSint16LE();
-
-	// Zero the wave address if we want to ignore the wave address info
-	if (ignoreAddr)
-		addr = 0;
-
-	return !(stream.eos() || stream.err());
-}
-
-bool IIgsWaveInfo::finalize(Common::SeekableReadStream &uint8Wave) {
-	uint32 startPos = uint8Wave.pos(); // Save stream's starting position
-	uint8Wave.seek(addr, SEEK_CUR); // Seek to wave's address
-
-	// Calculate the true sample size (A zero ends the sample prematurely)
-	uint trueSize = size; // Set a default value for the result
-	for (uint i = 0; i < size; i++) {
-		if (uint8Wave.readByte() == 0) {
-			trueSize = i;
-			// A zero in the sample stream turns off looping
-			// (At least that's what MESS 0.117 and KEGS32 0.91 seem to do)
-			if (mode == OSC_MODE_LOOP)
-				mode = OSC_MODE_ONESHOT;
-			break;
-		}
-	}
-	size = trueSize; // Set the true sample size
-
-	uint8Wave.seek(startPos); // Seek back to the stream's starting position
-
-	return true;
-}
-
-bool IIgsOscillator::finalize(Common::SeekableReadStream &uint8Wave) {
-	for (uint i = 0; i < WAVES_PER_OSCILLATOR; i++)
-		if (!waves[i].finalize(uint8Wave))
-			return false;
-
-	return true;
-}
-
-bool IIgsOscillatorList::read(Common::SeekableReadStream &stream, uint oscillatorCount, bool ignoreAddr) {
-	// First read the A waves and then the B waves for the oscillators
-	for (uint waveNum = 0; waveNum < WAVES_PER_OSCILLATOR; waveNum++)
-		for (uint oscNum = 0; oscNum < oscillatorCount; oscNum++)
-			if (!osc[oscNum].waves[waveNum].read(stream, ignoreAddr))
-				return false;
-
-	count = oscillatorCount; // Set the oscillator count
-
-	return true;
-}
-
-bool IIgsOscillatorList::finalize(Common::SeekableReadStream &uint8Wave) {
-	for (uint i = 0; i < count; i++)
-		if (!osc[i].finalize(uint8Wave))
-			return false;
-
-	return true;
-}
-
-bool IIgsInstrumentHeader::read(Common::SeekableReadStream &stream, bool ignoreAddr) {
-	env.read(stream);
-	relseg        = stream.readByte();
-	/*byte priority =*/ stream.readByte(); // Not needed? 32 in all tested data.
-	bendrange     = stream.readByte();
-	vibdepth      = stream.readByte();
-	vibspeed      = stream.readByte();
-	/*byte spare    =*/ stream.readByte(); // Not needed? 0 in all tested data.
-	byte wac      = stream.readByte(); // Read A wave count
-	byte wbc      = stream.readByte(); // Read B wave count
-	oscList.read(stream, wac, ignoreAddr); // Read the oscillators
-	return (wac == wbc) && !(stream.eos() || stream.err()); // A and B wave counts must match
-}
-
-bool IIgsInstrumentHeader::finalize(Common::SeekableReadStream &uint8Wave) {
-	return oscList.finalize(uint8Wave);
-}
-
-bool IIgsSampleHeader::read(Common::SeekableReadStream &stream) {
-	type             = stream.readUint16LE();
-	pitch            = stream.readByte();
-	unknownByte_Ofs3 = stream.readByte();
-	volume           = stream.readByte();
-	unknownByte_Ofs5 = stream.readByte();
-	instrumentSize   = stream.readUint16LE();
-	sampleSize       = stream.readUint16LE();
-	// Read the instrument header *ignoring* its wave address info
-
-	return instrument.read(stream, true);
-}
-
-bool IIgsSampleHeader::finalize(Common::SeekableReadStream &uint8Wave) {
-	return instrument.finalize(uint8Wave);
-}
-
-/** Older Apple IIGS AGI MIDI program change to instrument number mapping. */
-static const MidiProgramChangeMapping progToInstMappingV1 = {
-	{19, 20, 22, 23, 21, 24, 5, 5, 5, 5,
-	6, 7, 10, 9, 11, 9, 15, 8, 5, 5,
-	17, 16, 18, 12, 14, 5, 5, 5, 5, 5,
-	0, 1, 2, 9, 3, 4, 15, 2, 2, 2,
-	25, 13, 13, 25},
-	5
-};
-
-/** Newer Apple IIGS AGI MIDI program change to instrument number mapping. */
-static const MidiProgramChangeMapping progToInstMappingV2 = {
-	{21, 22, 24, 25, 23, 26, 6, 6, 6, 6,
-	7, 9, 12, 8, 13, 11, 17, 10, 6, 6,
-	19, 18, 20, 14, 16, 6, 6, 6, 6, 6,
-	0, 1, 2, 4, 3, 5, 17, 2, 2, 2,
-	27, 15, 15, 27},
-	6
-};
-
-/** Older Apple IIGS AGI instrument set. Used only by Space Quest I (AGI v1.002). */
-static const InstrumentSetInfo instSetV1 = {
-	1192, 26, "7ee16bbc135171ffd6b9120cc7ff1af2", "edd3bf8905d9c238e02832b732fb2e18", progToInstMappingV1
-};
-
-/** Newer Apple IIGS AGI instrument set (AGI v1.003+). Used by all others than Space Quest I. */
-static const InstrumentSetInfo instSetV2 = {
-	1292, 28, "b7d428955bb90721996de1cbca25e768", "c05fb0b0e11deefab58bc68fbd2a3d07", progToInstMappingV2
-};
-
-/** Information about different Apple IIGS AGI executables. */
-static const IIgsExeInfo IIgsExeInfos[] = {
-	{GID_SQ1,      "SQ",   0x1002, 138496, 0x80AD, instSetV1},
-	{GID_LSL1,     "LL",   0x1003, 141003, 0x844E, instSetV2},
-	{GID_AGIDEMO,  "DEMO", 0x1005, 141884, 0x8469, instSetV2},
-	{GID_KQ1,      "KQ",   0x1006, 141894, 0x8469, instSetV2},
-	{GID_PQ1,      "PQ",   0x1007, 141882, 0x8469, instSetV2},
-	{GID_MIXEDUP,  "MG",   0x1013, 142552, 0x84B7, instSetV2},
-	{GID_KQ2,      "KQ2",  0x1013, 143775, 0x84B7, instSetV2},
-	{GID_KQ3,      "KQ3",  0x1014, 144312, 0x84B7, instSetV2},
-	{GID_SQ2,      "SQ2",  0x1014, 107882, 0x6563, instSetV2},
-	{GID_MH1,      "MH",   0x2004, 147678, 0x8979, instSetV2},
-	{GID_KQ4,      "KQ4",  0x2006, 147652, 0x8979, instSetV2},
-	{GID_BC,       "BC",   0x3001, 148192, 0x8979, instSetV2},
-	{GID_GOLDRUSH, "GR",   0x3003, 148268, 0x8979, instSetV2}
-};
-
 static const int16 waveformRamp[WAVEFORM_SIZE] = {
 	0, 8, 16, 24, 32, 40, 48, 56,
 	64, 72, 80, 88, 96, 104, 112, 120,
@@ -370,7 +158,7 @@ void SoundMgr::startSound(int resnum, int flag) {
 	switch (type) {
 	case AGI_SOUND_SAMPLE: {
 		IIgsSample *sampleRes = (IIgsSample *) _vm->_game.sounds[_playingSound];
-		_gsSound.playSampleSound(sampleRes->getHeader(), sampleRes->getSample());
+		_gsSound->playSampleSound(sampleRes->getHeader(), sampleRes->getSample());
 		break;
 	}
 	case AGI_SOUND_MIDI:
@@ -411,8 +199,6 @@ void SoundMgr::stopSound() {
 
 	debugC(3, kDebugLevelSound, "stopSound() --> %d", _playingSound);
 
-	_vm->setflag(_endflag, true);
-
 	_endflag = -1;
 	if (_vm->_soundemu != SOUND_EMU_APPLE2GS) {
 		for (i = 0; i < NUM_CHANNELS; i++)
@@ -424,38 +210,13 @@ void SoundMgr::stopSound() {
 			_vm->_game.sounds[_playingSound]->stop();
 
 		if (_vm->_soundemu == SOUND_EMU_APPLE2GS) {
-			_gsSound.stopSounds();
+			_gsSound->stopSounds();
 		}
 
 		_playingSound = -1;
 	}
 }
 
-void IIgsSoundMgr::stopSounds() {
-	// Stops all sounds on all MIDI channels
-	for (iterator iter = _midiChannels.begin(); iter != _midiChannels.end(); ++iter)
-		iter->stopSounds();
-}
-
-bool IIgsSoundMgr::playSampleSound(const IIgsSampleHeader &sampleHeader, const int8 *sample) {
-	stopSounds();
-	IIgsMidiChannel &channel = _midiChannels[kSfxMidiChannel];
-
-	channel.setInstrument(&sampleHeader.instrument, sample);
-	channel.setVolume(sampleHeader.volume);
-	channel.noteOn(sampleHeader.pitch, 64); // Use default velocity (i.e. 64)
-
-	return true;
-}
-
-void IIgsMidiChannel::stopSounds() {
-	// Stops all sounds on this single MIDI channel
-	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
-		iter->stop();
-
-	_gsChannels.clear();
-}
-
 int SoundMgr::initSound() {
 	int r = -1;
 
@@ -540,290 +301,6 @@ void SoundMgr::playNote(int i, int freq, int vol) {
 	}
 }
 
-void SoundMgr::playMidiSound() {
-	if (_disabledMidi)
-		return;
-
-	const uint8 *p;
-	uint8 parm1, parm2;
-	static uint8 cmd, ch;
-
-	if (_playingSound == -1 || _vm->_game.sounds[_playingSound] == NULL) {
-		warning("Error playing Apple IIGS MIDI sound resource");
-		_playing = false;
-
-		return;
-	}
-
-	IIgsMidi *midiObj = (IIgsMidi *) _vm->_game.sounds[_playingSound];
-
-	_playing = true;
-	p = midiObj->getPtr();
-
-	midiObj->_soundBufTicks++;
-
-	while (true) {
-		uint8 readByte = *p;
-
-		// Check for end of MIDI sequence marker (Can also be here before delta-time)
-		if (readByte == MIDI_BYTE_STOP_SEQUENCE) {
-			debugC(3, kDebugLevelSound, "End of MIDI sequence (Before reading delta-time)");
-			_playing = false;
-
-			midiObj->rewind();
-
-			return;
-		} else if (readByte == MIDI_BYTE_TIMER_SYNC) {
-			debugC(3, kDebugLevelSound, "Timer sync");
-			p++; // Jump over the timer sync byte as it's not needed
-
-			continue;
-		}
-
-		uint8 deltaTime = readByte;
-		if (midiObj->_midiTicks + deltaTime > midiObj->_soundBufTicks) {
-			break;
-		}
-		midiObj->_midiTicks += deltaTime;
-		p++; // Jump over the delta-time byte as it was already taken care of
-
-		// Check for end of MIDI sequence marker (This time it after reading delta-time)
-		if (*p == MIDI_BYTE_STOP_SEQUENCE) {
-			debugC(3, kDebugLevelSound, "End of MIDI sequence (After reading delta-time)");
-			_playing = false;
-
-			midiObj->rewind();
-
-			return;
-		}
-
-		// Separate byte into command and channel if it's a command byte.
-		// Otherwise use running status (i.e. previously set command and channel).
-		if (*p & 0x80) {
-			cmd = *p++;
-			ch = cmd & 0x0f;
-			cmd >>= 4;
-		}
-
-		switch (cmd) {
-		case MIDI_CMD_NOTE_OFF:
-			parm1 = *p++;
-			parm2 = *p++;
-			_gsSound.midiNoteOff(ch, parm1, parm2);
-			break;
-		case MIDI_CMD_NOTE_ON:
-			parm1 = *p++;
-			parm2 = *p++;
-			_gsSound.midiNoteOn(ch, parm1, parm2);
-			break;
-		case MIDI_CMD_CONTROLLER:
-			parm1 = *p++;
-			parm2 = *p++;
-			_gsSound.midiController(ch, parm1, parm2);
-			break;
-		case MIDI_CMD_PROGRAM_CHANGE:
-			parm1 = *p++;
-			_gsSound.midiProgramChange(ch, parm1);
-			break;
-		case MIDI_CMD_PITCH_WHEEL:
-			parm1 = *p++;
-			parm2 = *p++;
-
-			uint16 wheelPos = ((parm2 & 0x7F) << 7) | (parm1 & 0x7F); // 14-bit value
-			_gsSound.midiPitchWheel(wheelPos);
-			break;
-		}
-	}
-
-	midiObj->setPtr(p);
-}
-
-void IIgsSoundMgr::midiNoteOff(uint8 channel, uint8 note, uint8 velocity) {
-	_midiChannels[channel].noteOff(note, velocity);
-	debugC(3, kDebugLevelSound, "note off, channel %02x, note %02x, velocity %02x", channel, note, velocity);
-}
-
-void IIgsSoundMgr::midiNoteOn(uint8 channel, uint8 note, uint8 velocity) {
-	_midiChannels[channel].noteOn(note, velocity);
-	debugC(3, kDebugLevelSound, "note  on, channel %02x, note %02x, velocity %02x", channel, note, velocity);
-}
-
-// TODO: Check if controllers behave differently on different MIDI channels
-// TODO: Doublecheck what other controllers than the volume controller do
-void IIgsSoundMgr::midiController(uint8 channel, uint8 controller, uint8 value) {
-	IIgsMidiChannel &midiChannel = _midiChannels[channel];
-
-	// The tested Apple IIGS AGI MIDI resources only used
-	// controllers 0 (Bank select?), 7 (Volume) and 64 (Sustain On/Off).
-	// Controller 0's parameter was in range 94-127,
-	// controller 7's parameter was in range 0-127 and
-	// controller 64's parameter was always 0 (i.e. sustain off).
-	bool unimplemented = false;
-	switch (controller) {
-	case 7: // Volume
-		midiChannel.setVolume(value);
-		break;
-	default:
-		unimplemented = true;
-		break;
-	}
-	debugC(3, kDebugLevelSound, "controller %02x, ch %02x, val %02x%s", controller, channel, value, unimplemented ? " (Unimplemented)" : "");
-}
-
-void IIgsSoundMgr::midiProgramChange(uint8 channel, uint8 program) {
-	_midiChannels[channel].setInstrument(getInstrument(program), _wave.begin());
-	debugC(3, kDebugLevelSound, "program change %02x, channel %02x", program, channel);
-}
-
-void IIgsSoundMgr::midiPitchWheel(uint8 wheelPos) {
-	// In all the tested Apple IIGS AGI MIDI resources
-	// pitch wheel commands always used 0x2000 (Center position).
-	// Therefore it should be quite safe to ignore this command.
-	debugC(3, kDebugLevelSound, "pitch wheel position %04x (Unimplemented)", wheelPos);
-}
-
-IIgsSoundMgr::IIgsSoundMgr() {
-	_midiChannels.resize(16); // Set the amount of available MIDI channels
-}
-
-const IIgsInstrumentHeader* IIgsSoundMgr::getInstrument(uint8 program) const {
-	return &_instruments[_midiProgToInst->map(program)];
-}
-
-void IIgsSoundMgr::setProgramChangeMapping(const MidiProgramChangeMapping *mapping) {
-	_midiProgToInst = mapping;
-}
-
-void IIgsSoundMgr::removeStoppedSounds() {
-	for (Common::Array<IIgsMidiChannel>::iterator iter = _midiChannels.begin(); iter != _midiChannels.end(); ++iter)
-		iter->removeStoppedSounds();
-}
-
-void IIgsMidiChannel::removeStoppedSounds() {
-	for (int i = _gsChannels.size() - 1; i >= 0; i--)
-		if (!_gsChannels[i].playing())
-			_gsChannels.remove_at(i);
-}
-
-uint IIgsSoundMgr::activeSounds() const {
-	uint result = 0;
-
-	for (Common::Array<IIgsMidiChannel>::const_iterator iter = _midiChannels.begin(); iter != _midiChannels.end(); ++iter)
-		result += iter->activeSounds();
-
-	return result;
-}
-
-uint IIgsMidiChannel::activeSounds() const {
-	uint result = 0;
-
-	for (const_iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
-		if (!iter->end)
-			result++;
-
-	return result;
-}
-
-void IIgsMidiChannel::setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample) {
-	_instrument = instrument;
-	_sample = sample;
-
-	// Set program on each Apple IIGS channel playing on this MIDI channel
-	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
-		iter->setInstrument(instrument, sample);
-}
-
-void IIgsMidiChannel::setVolume(uint8 volume) {
-	_volume = volume;
-
-	// Set volume on each Apple IIGS channel playing on this MIDI channel
-	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
-		iter->setChannelVolume(volume);
-}
-
-void IIgsMidiChannel::noteOff(uint8 note, uint8 velocity) {
-	// Go through all the notes playing on this MIDI channel
-	// and turn off the ones that are playing the given note
-	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
-		if (iter->origNote == note)
-			iter->noteOff(velocity);
-}
-
-void IIgsMidiChannel::noteOn(uint8 note, uint8 velocity) {
-	IIgsChannelInfo channel;
-
-	// Use the default channel volume and instrument
-	channel.setChannelVolume(_volume);
-	channel.setInstrument(_instrument, _sample);
-
-	// Set the note on and save the channel
-	channel.noteOn(note, velocity);
-	_gsChannels.push_back(channel);
-}
-
-void IIgsChannelInfo::rewind() {
-	this->envVol = this->startEnvVol;
-	this->envSeg = 0;
-	this->pos = intToFrac(0);
-}
-
-void IIgsChannelInfo::setChannelVolume(uint8 volume) {
-	this->chanVol = intToFrac(volume);
-}
-
-void IIgsChannelInfo::setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample) {
-	assert(instrument != NULL && sample != NULL);
-	this->ins = instrument;
-	this->unrelocatedSample = sample;
-}
-
-// TODO/FIXME: Implement correctly and fully (Take velocity into account etc)
-void IIgsChannelInfo::noteOn(uint8 noteParam, uint8 velocity) {
-	this->origNote = noteParam;
-	this->startEnvVol = intToFrac(0);
-	rewind();
-
-	const IIgsWaveInfo *waveInfo = NULL;
-
-	for (uint i = 0; i < ins->oscList.count; i++)
-		if (ins->oscList(i).waves[0].top >= noteParam)
-			waveInfo = &ins->oscList(i).waves[0];
-
-	assert(waveInfo != NULL);
-
-	this->relocatedSample = this->unrelocatedSample + waveInfo->addr;
-	this->posAdd  = intToFrac(0);
-	this->note    = intToFrac(noteParam) + doubleToFrac(waveInfo->relPitch/256.0);
-	this->vol     = doubleToFrac(fracToDouble(this->envVol) * fracToDouble(this->chanVol) / 127.0);
-	this->loop    = (waveInfo->mode == OSC_MODE_LOOP);
-	this->size    = waveInfo->size - waveInfo->addr;
-	this->end     = waveInfo->halt;
-}
-
-// TODO/FIXME: Implement correctly and fully (Take release time and velocity into account etc)
-void IIgsChannelInfo::noteOff(uint8 velocity) {
-	this->loop = false;
-	this->envSeg = ins->relseg;
-}
-
-void IIgsChannelInfo::stop() {
-	this->end = true;
-}
-
-bool IIgsChannelInfo::playing() {
-	return !this->end;
-}
-
-void SoundMgr::playSampleSound() {
-	if (_vm->_soundemu != SOUND_EMU_APPLE2GS) {
-		warning("Trying to play a sample but not using Apple IIGS sound emulation mode");
-		return;
-	}
-
-	if (_playingSound != -1)
-		_playing = _gsSound.activeSounds() > 0;
-}
-
 static int cocoFrequencies[] = {
 	 130,  138,  146,  155,  164,  174,  184,  195,  207,  220,  233,  246,
 	 261,  277,  293,  311,  329,  349,  369,  391,  415,  440,  466,  493,
@@ -946,9 +423,9 @@ uint32 SoundMgr::mixSound() {
 	// TODO: Implement playing both waves in an oscillator
 	// TODO: Implement swap-mode in an oscillator
 	if (_vm->_soundemu == SOUND_EMU_APPLE2GS) {
-		for (uint midiChan = 0; midiChan < _gsSound._midiChannels.size(); midiChan++) {
-			for (uint gsChan = 0; gsChan < _gsSound._midiChannels[midiChan]._gsChannels.size(); gsChan++) {
-				IIgsChannelInfo &channel = _gsSound._midiChannels[midiChan]._gsChannels[gsChan];
+		for (uint midiChan = 0; midiChan < _gsSound->_midiChannels.size(); midiChan++) {
+			for (uint gsChan = 0; gsChan < _gsSound->_midiChannels[midiChan]._gsChannels.size(); gsChan++) {
+				IIgsChannelInfo &channel = _gsSound->_midiChannels[midiChan]._gsChannels[gsChan];
 				if (channel.playing()) { // Only mix in actively playing channels
 					// Frequency multiplier was 1076.0 based on tests made with MESS 0.117.
 					// Tests made with KEGS32 averaged the multiplier to around 1045.
@@ -1002,7 +479,7 @@ uint32 SoundMgr::mixSound() {
 				}
 			}
 		}
-		_gsSound.removeStoppedSounds();
+		_gsSound->removeStoppedSounds();
 		return IIGS_BUFFER_SIZE;
 	} // else ...
 
@@ -1078,77 +555,6 @@ uint32 SoundMgr::mixSound() {
 }
 
 /**
- * Finds information about an Apple IIGS AGI executable based on the game ID.
- * @return A non-null IIgsExeInfo pointer if successful, otherwise NULL.
- */
-const IIgsExeInfo *SoundMgr::getIIgsExeInfo(enum AgiGameID gameid) const {
-	for (int i = 0; i < ARRAYSIZE(IIgsExeInfos); i++)
-		if (IIgsExeInfos[i].gameid == gameid)
-			return &IIgsExeInfos[i];
-	return NULL;
-}
-
-bool IIgsSoundMgr::loadInstrumentHeaders(const Common::FSNode &exePath, const IIgsExeInfo &exeInfo) {
-	bool loadedOk = false; // Was loading successful?
-	Common::File file;
-
-	// Open the executable file and check that it has correct size
-	file.open(exePath);
-	if (file.size() != (int32)exeInfo.exeSize) {
-		debugC(3, kDebugLevelSound, "Apple IIGS executable (%s) has wrong size (Is %d, should be %d)",
-			exePath.getPath().c_str(), file.size(), exeInfo.exeSize);
-	}
-
-	// Read the whole executable file into memory
-	Common::SharedPtr<Common::MemoryReadStream> data(file.readStream(file.size()));
-	file.close();
-
-	// Check that we got enough data to be able to parse the instruments
-	if (data && data->size() >= (int32)(exeInfo.instSetStart + exeInfo.instSet.byteCount)) {
-		// Check instrument set's length (The info's saved in the executable)
-		data->seek(exeInfo.instSetStart - 4);
-		uint16 instSetByteCount = data->readUint16LE();
-		if (instSetByteCount != exeInfo.instSet.byteCount) {
-			debugC(3, kDebugLevelSound, "Wrong instrument set size (Is %d, should be %d) in Apple IIGS executable (%s)",
-				instSetByteCount, exeInfo.instSet.byteCount, exePath.getPath().c_str());
-		}
-
-		// Check instrument set's md5sum
-		data->seek(exeInfo.instSetStart);
-
-		char md5str[32+1];
-		Common::md5_file_string(*data, md5str, exeInfo.instSet.byteCount);
-		if (scumm_stricmp(md5str, exeInfo.instSet.md5)) {
-			warning("Unknown Apple IIGS instrument set (md5: %s) in %s, trying to use it nonetheless",
-				md5str, exePath.getPath().c_str());
-		}
-
-		// Read in the instrument set one instrument at a time
-		data->seek(exeInfo.instSetStart);
-
-		// Load the instruments
-		_instruments.clear();
-		_instruments.reserve(exeInfo.instSet.instCount);
-
-		IIgsInstrumentHeader instrument;
-		for (uint i = 0; i < exeInfo.instSet.instCount; i++) {
-			if (!instrument.read(*data)) {
-				warning("Error loading Apple IIGS instrument (%d. of %d) from %s, not loading more instruments",
-					i + 1, exeInfo.instSet.instCount, exePath.getPath().c_str());
-				break;
-			}
-			_instruments.push_back(instrument); // Add the successfully loaded instrument to the instruments array
-		}
-
-		// Loading was successful only if all instruments were loaded successfully
-		loadedOk = (_instruments.size() == exeInfo.instSet.instCount);
-	} else // Couldn't read enough data from the executable file
-		warning("Error loading instruments from Apple IIGS executable (%s)", exePath.getPath().c_str());
-
-	return loadedOk;
-}
-
-/**
  * Convert sample from 8-bit unsigned to 8-bit signed format.
  * @param source  Source stream containing the 8-bit unsigned sample data.
  * @param dest  Destination buffer for the 8-bit signed sample data.
@@ -1161,111 +567,6 @@ bool SoundMgr::convertWave(Common::SeekableReadStream &source, int8 *dest, uint
 	return !(source.eos() || source.err());
 }
 
-bool IIgsSoundMgr::loadWaveFile(const Common::FSNode &wavePath, const IIgsExeInfo &exeInfo) {
-	Common::File file;
-
-	// Open the wave file and read it into memory
-	file.open(wavePath);
-	Common::SharedPtr<Common::MemoryReadStream> uint8Wave(file.readStream(file.size()));
-	file.close();
-
-	// Check that we got the whole wave file
-	if (uint8Wave && uint8Wave->size() == SIERRASTANDARD_SIZE) {
-		// Check wave file's md5sum
-		char md5str[32+1];
-		Common::md5_file_string(*uint8Wave, md5str, SIERRASTANDARD_SIZE);
-		if (scumm_stricmp(md5str, exeInfo.instSet.waveFileMd5)) {
-			warning("Unknown Apple IIGS wave file (md5: %s, game: %s).\n" \
-				"Please report the information on the previous line to the ScummVM team.\n" \
-				"Using the wave file as it is - music may sound weird", md5str, exeInfo.exePrefix);
-		}
-
-		uint8Wave->seek(0); // Seek wave to its start
-		// Convert the wave file from 8-bit unsigned to 8-bit signed and save the result
-		_wave.resize(uint8Wave->size());
-		return SoundMgr::convertWave(*uint8Wave, _wave.begin(), uint8Wave->size());
-	} else { // Couldn't read the wave file or it had incorrect size
-		warning("Error loading Apple IIGS wave file (%s), not loading instruments", wavePath.getPath().c_str());
-		return false;
-	}
-}
-
-/**
- * A function object (i.e. a functor) for testing if a Common::FSNode
- * object's name is equal (Ignoring case) to a string or to at least
- * one of the strings in a list of strings. Can be used e.g. with find_if().
- */
-struct fsnodeNameEqualsIgnoreCase : public Common::UnaryFunction<const Common::FSNode&, bool> {
-// FIXME: This should be replaced; use SearchMan instead
-	fsnodeNameEqualsIgnoreCase(const Common::StringArray &str) : _str(str) {}
-	fsnodeNameEqualsIgnoreCase(const Common::String str) { _str.push_back(str); }
-	bool operator()(const Common::FSNode &param) const {
-		for (Common::StringArray::const_iterator iter = _str.begin(); iter != _str.end(); ++iter)
-			if (param.getName().equalsIgnoreCase(*iter))
-				return true;
-		return false;
-	}
-private:
-	Common::StringArray _str;
-};
-
-bool SoundMgr::loadInstruments() {
-	// Check that the platform is Apple IIGS, as only it uses custom instruments
-	if (_vm->getPlatform() != Common::kPlatformApple2GS) {
-		debugC(3, kDebugLevelSound, "Platform isn't Apple IIGS so not loading any instruments");
-		return true;
-	}
-
-	// Get info on the particular Apple IIGS AGI game's executable
-	const IIgsExeInfo *exeInfo = getIIgsExeInfo((enum AgiGameID) _vm->getGameID());
-	if (exeInfo == NULL) {
-		warning("Unsupported Apple IIGS game, not loading instruments");
-		return false;
-	}
-
-	// List files in the game path
-	Common::FSList fslist;
-	Common::FSNode dir(ConfMan.get("path"));
-	if (!dir.getChildren(fslist, Common::FSNode::kListFilesOnly)) {
-		warning("Invalid game path (\"%s\"), not loading Apple IIGS instruments", dir.getPath().c_str());
-		return false;
-	}
-
-	// Populate executable filenames list (Long filename and short filename) for searching
-	Common::StringArray exeNames;
-	exeNames.push_back(Common::String(exeInfo->exePrefix) + ".SYS16");
-	exeNames.push_back(Common::String(exeInfo->exePrefix) + ".SYS");
-
-	// Populate wave filenames list (Long filename and short filename) for searching
-	Common::StringArray waveNames;
-	waveNames.push_back("SIERRASTANDARD");
-	waveNames.push_back("SIERRAST");
-
-	// Search for the executable file and the wave file (i.e. check if any of the filenames match)
-	Common::FSList::const_iterator exeFsnode, waveFsnode;
-	exeFsnode  = Common::find_if(fslist.begin(), fslist.end(), fsnodeNameEqualsIgnoreCase(exeNames));
-	waveFsnode = Common::find_if(fslist.begin(), fslist.end(), fsnodeNameEqualsIgnoreCase(waveNames));
-
-	// Make sure that we found the executable file
-	if (exeFsnode == fslist.end()) {
-		warning("Couldn't find Apple IIGS game executable (%s), not loading instruments", exeNames.begin()->c_str());
-		return false;
-	}
-
-	// Make sure that we found the wave file
-	if (waveFsnode == fslist.end()) {
-		warning("Couldn't find Apple IIGS wave file (%s), not loading instruments", waveNames.begin()->c_str());
-		return false;
-	}
-
-	// Set the MIDI program change to instrument number mapping and
-	// load the instrument headers and their sample data.
-	// None of the tested SIERRASTANDARD-files have zeroes in them so
-	// there's no need to check for prematurely ending samples here.
-	_gsSound.setProgramChangeMapping(&exeInfo->instSet.progToInst);
-	return _gsSound.loadWaveFile(*waveFsnode, *exeInfo) && _gsSound.loadInstrumentHeaders(*exeFsnode, *exeInfo);
-}
-
 void SoundMgr::fillAudio(void *udata, int16 *stream, uint len) {
 	SoundMgr *soundMgr = (SoundMgr *)udata;
 	uint32 p = 0;
@@ -1306,6 +607,8 @@ SoundMgr::SoundMgr(AgiBase *agi, Audio::Mixer *pMixer) : _chn() {
 	_waveform = 0;
 	_disabledMidi = false;
 	_useChorus = true;	// FIXME: Currently always true?
+
+	_gsSound = new IIgsSoundMgr;
 }
 
 void SoundMgr::premixerCall(int16 *data, uint len) {
@@ -1318,6 +621,7 @@ void SoundMgr::setVolume(uint8 volume) {
 
 SoundMgr::~SoundMgr() {
 	free(_sndBuffer);
+	delete _gsSound;
 }
 
 } // End of namespace Agi
diff --git a/engines/agi/sound.h b/engines/agi/sound.h
index 881e3efd56..ab0c9e20e5 100644
--- a/engines/agi/sound.h
+++ b/engines/agi/sound.h
@@ -28,20 +28,11 @@
 
 #include "sound/audiostream.h"
 #include "sound/mixer.h"
-#include "common/frac.h"
 
 namespace Agi {
 
 #define BUFFER_SIZE	410
 
-// Apple IIGS MIDI uses 60 ticks per second (Based on tests with Apple IIGS
-// KQ1 and SQ1 under MESS 0.124a). So we make the audio buffer size to be a
-// 1/60th of a second in length. That should be getSampleRate() / 60 samples
-// in length but as getSampleRate() is always 22050 at the moment we just use
-// the hardcoded value of 368 (22050/60 = 367.5 which rounds up to 368).
-// FIXME: Use getSampleRate() / 60 rather than a hardcoded value
-#define IIGS_BUFFER_SIZE 368
-
 #define SOUND_EMU_NONE	0
 #define SOUND_EMU_PC	1
 #define SOUND_EMU_TANDY	2
@@ -57,130 +48,6 @@ namespace Agi {
 #define ENV_RELEASE	7500		/**< envelope release rate */
 #define NUM_CHANNELS    7		/**< number of sound channels */
 
-// MIDI command values (Shifted right by 4 so they're in the lower nibble)
-#define MIDI_CMD_NOTE_OFF        0x08
-#define MIDI_CMD_NOTE_ON         0x09
-#define MIDI_CMD_CONTROLLER      0x0B
-#define MIDI_CMD_PROGRAM_CHANGE  0x0C
-#define MIDI_CMD_PITCH_WHEEL     0x0E
-// Whole MIDI byte values (Command and channel info together)
-#define MIDI_BYTE_STOP_SEQUENCE  0xFC
-#define MIDI_BYTE_TIMER_SYNC     0xF8
-
-struct IIgsEnvelopeSegment {
-	uint8 bp;
-	uint16 inc; ///< 8b.8b fixed point, very probably little endian
-};
-
-#define ENVELOPE_SEGMENT_COUNT 8
-struct IIgsEnvelope {
-	IIgsEnvelopeSegment seg[ENVELOPE_SEGMENT_COUNT];
-
-	/** Reads an Apple IIGS envelope from then given stream. */
-	bool read(Common::SeekableReadStream &stream);
-};
-
-// 2**(1/12) i.e. the 12th root of 2
-#define SEMITONE 1.059463094359295
-
-// C6's frequency is A4's (440 Hz) frequency but one full octave and three semitones higher
-// i.e. C6_FREQ = 440 * pow(2.0, 15/12.0)
-#define C6_FREQ 1046.502261202395
-
-// Size of the SIERRASTANDARD file (i.e. the wave file i.e. the sample data used by the instruments).
-#define SIERRASTANDARD_SIZE 65536
-
-// Maximum number of instruments in an Apple IIGS instrument set.
-// Chosen empirically based on Apple IIGS AGI game data, increase if needed.
-#define MAX_INSTRUMENTS 28
-
-struct IIgsWaveInfo {
-	uint8 top;
-	uint addr;
-	uint size;
-// Oscillator channel
-#define OSC_CHANNEL_RIGHT 0
-#define OSC_CHANNEL_LEFT  1
-	uint channel;
-// Oscillator mode
-#define OSC_MODE_LOOP     0
-#define OSC_MODE_ONESHOT  1
-#define OSC_MODE_SYNC_AM  2
-#define OSC_MODE_SWAP     3
-	uint mode;
-	bool halt;
-	int16 relPitch; ///< Relative pitch in semitones (Signed 8b.8b fixed point)
-
-	/** Reads an Apple IIGS wave information structure from the given stream. */
-	bool read(Common::SeekableReadStream &stream, bool ignoreAddr = false);
-	bool finalize(Common::SeekableReadStream &uint8Wave);
-};
-
-// Number of waves per Apple IIGS sound oscillator
-#define WAVES_PER_OSCILLATOR 2
-
-/** An Apple IIGS sound oscillator. Consists always of two waves. */
-struct IIgsOscillator {
-	IIgsWaveInfo waves[WAVES_PER_OSCILLATOR];
-
-	bool finalize(Common::SeekableReadStream &uint8Wave);
-};
-
-// Maximum number of oscillators in an Apple IIGS instrument.
-// Chosen empirically based on Apple IIGS AGI game data, increase if needed.
-#define MAX_OSCILLATORS 4
-
-/** An Apple IIGS sound oscillator list. */
-struct IIgsOscillatorList {
-	uint count; ///< Oscillator count
-	IIgsOscillator osc[MAX_OSCILLATORS]; ///< The oscillators
-
-	/** Indexing operators for easier access to the oscillators. */
-	const IIgsOscillator &operator()(uint index) const { return osc[index]; }
-	IIgsOscillator &operator()(uint index) { return osc[index]; }
-
-	/** Reads an Apple IIGS oscillator list from the given stream. */
-	bool read(Common::SeekableReadStream &stream, uint oscillatorCount, bool ignoreAddr = false);
-	bool finalize(Common::SeekableReadStream &uint8Wave);
-};
-
-struct IIgsInstrumentHeader {
-	IIgsEnvelope env;
-	uint8 relseg;
-	uint8 bendrange;
-	uint8 vibdepth;
-	uint8 vibspeed;
-	IIgsOscillatorList oscList;
-
-	/**
-	 * Read an Apple IIGS instrument header from the given stream.
-	 * @param stream The source stream from which to read the data.
-	 * @param ignoreAddr Should we ignore wave infos' wave address variable's value?
-	 * @return True if successful, false otherwise.
-	 */
-	bool read(Common::SeekableReadStream &stream, bool ignoreAddr = false);
-	bool finalize(Common::SeekableReadStream &uint8Wave);
-};
-
-struct IIgsSampleHeader {
-	uint16 type;
-	uint8  pitch; ///< Logarithmic, base is 2**(1/12), unknown multiplier (Possibly in range 1040-1080)
-	uint8  unknownByte_Ofs3; // 0x7F in Gold Rush's sound resource 60, 0 in all others.
-	uint8  volume; ///< Current guess: Logarithmic in 6 dB steps
-	uint8  unknownByte_Ofs5; ///< 0 in all tested samples.
-	uint16 instrumentSize; ///< Little endian. 44 in all tested samples. A guess.
-	uint16 sampleSize; ///< Little endian. Accurate in all tested samples excluding Manhunter I's sound resource 16.
-	IIgsInstrumentHeader instrument;
-
-	/**
-	 * Read an Apple IIGS AGI sample header from the given stream.
-	 * @param stream The source stream from which to read the data.
-	 * @return True if successful, false otherwise.
-	 */
-	bool read(Common::SeekableReadStream &stream);
-	bool finalize(Common::SeekableReadStream &uint8Wave);
-};
-
 /**
  * AGI sound note structure.
  */
@@ -200,32 +67,6 @@ struct AgiNote {
 	}
 };
 
-struct IIgsChannelInfo {
-	const IIgsInstrumentHeader *ins; ///< Instrument info
-	const int8 *relocatedSample; ///< Source sample data (8-bit signed format) using relocation
-	const int8 *unrelocatedSample; ///< Source sample data (8-bit signed format) without relocation
-	frac_t pos;     ///< Current sample position
-	frac_t posAdd;  ///< Current sample position adder (Calculated using note, vibrato etc)
-	uint8 origNote; ///< The original note without the added relative pitch
-	frac_t note;    ///< Note (With the added relative pitch)
-	frac_t vol;     ///< Current volume (Takes both channel volume and enveloping into account)
-	frac_t chanVol; ///< Channel volume
-	frac_t startEnvVol; ///< Starting envelope volume
-	frac_t envVol;  ///< Current envelope volume
-	uint   envSeg;  ///< Current envelope segment
-	uint   size;    ///< Sample size
-	bool   loop;    ///< Should we loop the sample?
-	bool   end;     ///< Has the playing ended?
-
-	void rewind(); ///< Rewinds the sound playing on this channel to its start
-	void setChannelVolume(uint8 volume); ///< Sets the channel volume
-	void setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample); ///< Sets the instrument to be used on this channel
-	void noteOn(uint8 noteParam, uint8 velocity); ///< Starts playing a note on this channel
-	void noteOff(uint8 velocity); ///< Releases the note on this channel
-	void stop(); ///< Stops the note playing on this channel instantly
-	bool playing(); ///< Is there a note playing on this channel?
-};
-
 struct CoCoNote {
 	uint8  freq;
 	uint8  volume;
@@ -322,126 +163,11 @@ protected:
 	uint16 _type; ///< Sound resource type
 };
 
-class IIgsMidi : public AgiSound {
-public:
-	IIgsMidi(uint8 *data, uint32 len, int resnum, SoundMgr &manager);
-	~IIgsMidi() { if (_data != NULL) free(_data); }
-	virtual uint16 type() { return _type; }
-	virtual const uint8 *getPtr() { return _ptr; }
-	virtual void setPtr(const uint8 *ptr) { _ptr = ptr; }
-	virtual void rewind() { _ptr = _data + 2; _midiTicks = _soundBufTicks = 0; }
-protected:
-	uint8 *_data; ///< Raw sound resource data
-	const uint8 *_ptr; ///< Pointer to the current position in the MIDI data
-	uint32 _len; ///< Length of the raw sound resource
-	uint16 _type; ///< Sound resource type
-public:
-	uint _midiTicks; ///< MIDI song position in ticks (1/60ths of a second)
-	uint _soundBufTicks; ///< Sound buffer position in ticks (1/60ths of a second)
-};
-
-class IIgsSample : public AgiSound {
-public:
-	IIgsSample(uint8 *data, uint32 len, int resnum, SoundMgr &manager);
-	~IIgsSample() { delete[] _sample; }
-	virtual uint16 type() { return _header.type; }
-	const IIgsSampleHeader &getHeader() const { return _header; }
-	const int8 *getSample() const { return _sample; }
-protected:
-	IIgsSampleHeader _header; ///< Apple IIGS AGI sample header
-	int8 *_sample;           ///< Sample data (8-bit signed format)
-};
-
-/** Apple IIGS MIDI program change to instrument number mapping. */
-struct MidiProgramChangeMapping {
-	byte midiProgToInst[44]; ///< Lookup table for the MIDI program number to instrument number mapping
-	byte undefinedInst; ///< The undefined instrument number
-
-	// Maps the MIDI program number to an instrument number
-	byte map(uint midiProg) const {
-		return midiProg < ARRAYSIZE(midiProgToInst) ? midiProgToInst[midiProg] : undefinedInst;
-	}
-};
-
-/** Apple IIGS AGI instrument set information. */
-struct InstrumentSetInfo {
-	uint byteCount;          ///< Length of the whole instrument set in bytes
-	uint instCount;          ///< Amount of instrument in the set
-	const char *md5;         ///< MD5 hex digest of the whole instrument set
-	const char *waveFileMd5; ///< MD5 hex digest of the wave file (i.e. the sample data used by the instruments)
-	const MidiProgramChangeMapping &progToInst; ///< Program change to instrument number mapping
-};
-
-/** Apple IIGS AGI executable file information. */
-struct IIgsExeInfo {
-	enum AgiGameID gameid;            ///< Game ID
-	const char *exePrefix;            ///< Prefix of the Apple IIGS AGI executable (e.g. "SQ", "PQ", "KQ4" etc)
-	uint agiVer;                      ///< Apple IIGS AGI version number, not strictly needed
-	uint exeSize;                     ///< Size of the Apple IIGS AGI executable file in bytes
-	uint instSetStart;                ///< Starting offset of the instrument set inside the executable file
-	const InstrumentSetInfo &instSet; ///< Information about the used instrument set
-};
-
-class IIgsMidiChannel {
-public:
-	IIgsMidiChannel() : _instrument(0), _sample(0), _volume(0) {}
-	uint activeSounds() const; ///< How many active sounds are playing?
-	void setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample);
-	void setVolume(uint8 volume);
-	void noteOff(uint8 note, uint8 velocity);
-	void noteOn(uint8 note, uint8 velocity);
-	void stopSounds(); ///< Clears the channel of any sounds
-	void removeStoppedSounds(); ///< Removes all stopped sounds from this MIDI channel
-public:
-	typedef Common::Array<IIgsChannelInfo>::const_iterator const_iterator;
-	typedef Common::Array<IIgsChannelInfo>::iterator iterator;
-	Common::Array<IIgsChannelInfo> _gsChannels;	///< Apple IIGS channels playing on this MIDI channel
-protected:
-	const IIgsInstrumentHeader *_instrument;	///< Instrument used on this MIDI channel
-	const int8 *_sample;						///< Sample data used on this MIDI channel
-	uint8 _volume;								///< MIDI controller number 7 (Volume)
-};
-
-/**
- * Class for managing Apple IIGS sound channels.
- * TODO: Check what instruments are used by default on the MIDI channels
- * FIXME: Some instrument choices sound wrong
- */
-class IIgsSoundMgr {
-public:
-	typedef Common::Array<IIgsMidiChannel>::const_iterator const_iterator;
-	typedef Common::Array<IIgsMidiChannel>::iterator iterator;
-	static const uint kSfxMidiChannel = 0; ///< The MIDI channel used for playing sound effects
-public:
-	// For initializing
-	IIgsSoundMgr();
-	void setProgramChangeMapping(const MidiProgramChangeMapping *mapping);
-	bool loadInstrumentHeaders(const Common::FSNode &exePath, const IIgsExeInfo &exeInfo);
-	bool loadWaveFile(const Common::FSNode &wavePath, const IIgsExeInfo &exeInfo);
-	// Miscellaneous methods
-	uint activeSounds() const; ///< How many active sounds are playing?
-	void stopSounds(); ///< Stops all sounds
-	void removeStoppedSounds(); ///< Removes all stopped sounds from the MIDI channels
-	// For playing Apple IIGS AGI samples (Sound effects etc)
-	bool playSampleSound(const IIgsSampleHeader &sampleHeader, const int8 *sample);
-	// MIDI commands
-	void midiNoteOff(uint8 channel, uint8 note, uint8 velocity);
-	void midiNoteOn(uint8 channel, uint8 note, uint8 velocity);
-	void midiController(uint8 channel, uint8 controller, uint8 value);
-	void midiProgramChange(uint8 channel, uint8 program);
-	void midiPitchWheel(uint8 wheelPos);
-protected:
-	const IIgsInstrumentHeader* getInstrument(uint8 program) const;
-public:
-	Common::Array<IIgsMidiChannel> _midiChannels;		///< Information about each MIDI channel
-protected:
-	Common::Array<int8> _wave;							///< Sample data used by the Apple IIGS MIDI instruments
-	const MidiProgramChangeMapping *_midiProgToInst;	///< MIDI program change to instrument number mapping
-	Common::Array<IIgsInstrumentHeader> _instruments;	///< Instruments used by the Apple IIGS AGI
-};
-
 class AgiEngine;
 class AgiBase;
+class IIgsSoundMgr;
+
+struct IIgsExeInfo;
 
 class SoundMgr : public Audio::AudioStream {
 	AgiBase *_vm;
@@ -477,7 +203,7 @@ private:
 
 	bool _playing;
 	ChannelInfo _chn[NUM_CHANNELS];
-	IIgsSoundMgr _gsSound;
+	IIgsSoundMgr *_gsSound;
 	int _endflag;
 	int _playingSound;
 	uint8 _env;
diff --git a/engines/agi/sound_2gs.cpp b/engines/agi/sound_2gs.cpp
new file mode 100644
index 0000000000..ce4aa160a0
--- /dev/null
+++ b/engines/agi/sound_2gs.cpp
@@ -0,0 +1,736 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/md5.h"
+#include "common/config-manager.h"
+#include "common/fs.h"
+#include "common/random.h"
+#include "common/str-array.h"
+
+#include "agi/agi.h"
+#include "agi/sound_2gs.h"
+
+namespace Agi {
+
+IIgsMidi::IIgsMidi(uint8 *data, uint32 len, int resnum, SoundMgr &manager) : AgiSound(manager) {
+	_data = data; // Save the resource pointer
+	_ptr = _data + 2; // Set current position to just after the header
+	_len  = len;  // Save the resource's length
+	_type = READ_LE_UINT16(data); // Read sound resource's type
+	_midiTicks = _soundBufTicks = 0;
+	_isValid = (_type == AGI_SOUND_MIDI) && (_data != NULL) && (_len >= 2);
+
+	if (!_isValid) // Check for errors
+		warning("Error creating Apple IIGS midi sound from resource %d (Type %d, length %d)", resnum, _type, len);
+}
+
+IIgsSample::IIgsSample(uint8 *data, uint32 len, int resnum, SoundMgr &manager) : AgiSound(manager) {
+	Common::MemoryReadStream stream(data, len, DisposeAfterUse::YES);
+
+	// Check that the header was read ok and that it's of the correct type
+	if (_header.read(stream) && _header.type == AGI_SOUND_SAMPLE) { // An Apple IIGS AGI sample resource
+		uint32 sampleStartPos = stream.pos();
+		uint32 tailLen = stream.size() - sampleStartPos;
+
+		if (tailLen < _header.sampleSize) { // Check if there's no room for the sample data in the stream
+			// Apple IIGS Manhunter I: Sound resource 16 has only 16074 bytes
+			// of sample data although header says it should have 16384 bytes.
+			warning("Apple IIGS sample (%d) too short (%d bytes. Should be %d bytes). Using the part that's left",
+				resnum, tailLen, _header.sampleSize);
+
+			_header.sampleSize = (uint16) tailLen; // Use the part that's left
+		}
+
+		if (_header.pitch > 0x7F) { // Check if the pitch is invalid
+			warning("Apple IIGS sample (%d) has too high pitch (0x%02x)", resnum, _header.pitch);
+
+			_header.pitch &= 0x7F; // Apple IIGS AGI probably did it this way too
+		}
+
+		// Finalize the header info using the 8-bit unsigned sample data
+		_header.finalize(stream);
+
+		// Convert sample data from 8-bit unsigned to 8-bit signed format
+		stream.seek(sampleStartPos);
+		_sample = new int8[_header.sampleSize];
+
+		if (_sample != NULL)
+			_isValid = SoundMgr::convertWave(stream, _sample, _header.sampleSize);
+	}
+
+	if (!_isValid) // Check for errors
+		warning("Error creating Apple IIGS sample from resource %d (Type %d, length %d)", resnum, _header.type, len);
+}
+
+/** Reads an Apple IIGS envelope from then given stream. */
+bool IIgsEnvelope::read(Common::SeekableReadStream &stream) {
+	for (int segNum = 0; segNum < ENVELOPE_SEGMENT_COUNT; segNum++) {
+		seg[segNum].bp  = stream.readByte();
+		seg[segNum].inc = stream.readUint16LE();
+	}
+
+	return !(stream.eos() || stream.err());
+}
+
+/** Reads an Apple IIGS wave information structure from the given stream. */
+bool IIgsWaveInfo::read(Common::SeekableReadStream &stream, bool ignoreAddr) {
+	top  = stream.readByte();
+	addr = stream.readByte() * 256;
+	size = (1 << (stream.readByte() & 7)) * 256;
+
+	// Read packed mode byte and parse it into parts
+	byte packedModeByte = stream.readByte();
+	channel = (packedModeByte >> 4) & 1; // Bit 4
+	mode    = (packedModeByte >> 1) & 3; // Bits 1-2
+	halt    = (packedModeByte & 1) != 0; // Bit 0 (Converted to boolean)
+
+	relPitch = stream.readSint16LE();
+
+	// Zero the wave address if we want to ignore the wave address info
+	if (ignoreAddr)
+		addr = 0;
+
+	return !(stream.eos() || stream.err());
+}
+
+bool IIgsWaveInfo::finalize(Common::SeekableReadStream &uint8Wave) {
+	uint32 startPos = uint8Wave.pos(); // Save stream's starting position
+	uint8Wave.seek(addr, SEEK_CUR); // Seek to wave's address
+
+	// Calculate the true sample size (A zero ends the sample prematurely)
+	uint trueSize = size; // Set a default value for the result
+	for (uint i = 0; i < size; i++) {
+		if (uint8Wave.readByte() == 0) {
+			trueSize = i;
+			// A zero in the sample stream turns off looping
+			// (At least that's what MESS 0.117 and KEGS32 0.91 seem to do)
+			if (mode == OSC_MODE_LOOP)
+				mode = OSC_MODE_ONESHOT;
+			break;
+		}
+	}
+	size = trueSize; // Set the true sample size
+
+	uint8Wave.seek(startPos); // Seek back to the stream's starting position
+
+	return true;
+}
+
+bool IIgsOscillator::finalize(Common::SeekableReadStream &uint8Wave) {
+	for (uint i = 0; i < WAVES_PER_OSCILLATOR; i++)
+		if (!waves[i].finalize(uint8Wave))
+			return false;
+
+	return true;
+}
+
+bool IIgsOscillatorList::read(Common::SeekableReadStream &stream, uint oscillatorCount, bool ignoreAddr) {
+	// First read the A waves and then the B waves for the oscillators
+	for (uint waveNum = 0; waveNum < WAVES_PER_OSCILLATOR; waveNum++)
+		for (uint oscNum = 0; oscNum < oscillatorCount; oscNum++)
+			if (!osc[oscNum].waves[waveNum].read(stream, ignoreAddr))
+				return false;
+
+	count = oscillatorCount; // Set the oscillator count
+
+	return true;
+}
+
+bool IIgsOscillatorList::finalize(Common::SeekableReadStream &uint8Wave) {
+	for (uint i = 0; i < count; i++)
+		if (!osc[i].finalize(uint8Wave))
+			return false;
+
+	return true;
+}
+
+bool IIgsInstrumentHeader::read(Common::SeekableReadStream &stream, bool ignoreAddr) {
+	env.read(stream);
+	relseg        = stream.readByte();
+	/*byte priority =*/ stream.readByte(); // Not needed? 32 in all tested data.
+	bendrange     = stream.readByte();
+	vibdepth      = stream.readByte();
+	vibspeed      = stream.readByte();
+	/*byte spare    =*/ stream.readByte(); // Not needed? 0 in all tested data.
+	byte wac      = stream.readByte(); // Read A wave count
+	byte wbc      = stream.readByte(); // Read B wave count
+	oscList.read(stream, wac, ignoreAddr); // Read the oscillators
+	return (wac == wbc) && !(stream.eos() || stream.err()); // A and B wave counts must match
+}
+
+bool IIgsInstrumentHeader::finalize(Common::SeekableReadStream &uint8Wave) {
+	return oscList.finalize(uint8Wave);
+}
+
+bool IIgsSampleHeader::read(Common::SeekableReadStream &stream) {
+	type             = stream.readUint16LE();
+	pitch            = stream.readByte();
+	unknownByte_Ofs3 = stream.readByte();
+	volume           = stream.readByte();
+	unknownByte_Ofs5 = stream.readByte();
+	instrumentSize   = stream.readUint16LE();
+	sampleSize       = stream.readUint16LE();
+	// Read the instrument header *ignoring* its wave address info
+
+	return instrument.read(stream, true);
+}
+
+bool IIgsSampleHeader::finalize(Common::SeekableReadStream &uint8Wave) {
+	return instrument.finalize(uint8Wave);
+}
+
+/** Older Apple IIGS AGI MIDI program change to instrument number mapping. */
+static const MidiProgramChangeMapping progToInstMappingV1 = {
+	{19, 20, 22, 23, 21, 24, 5, 5, 5, 5,
+	6, 7, 10, 9, 11, 9, 15, 8, 5, 5,
+	17, 16, 18, 12, 14, 5, 5, 5, 5, 5,
+	0, 1, 2, 9, 3, 4, 15, 2, 2, 2,
+	25, 13, 13, 25},
+	5
+};
+
+/** Newer Apple IIGS AGI MIDI program change to instrument number mapping. */
+static const MidiProgramChangeMapping progToInstMappingV2 = {
+	{21, 22, 24, 25, 23, 26, 6, 6, 6, 6,
+	7, 9, 12, 8, 13, 11, 17, 10, 6, 6,
+	19, 18, 20, 14, 16, 6, 6, 6, 6, 6,
+	0, 1, 2, 4, 3, 5, 17, 2, 2, 2,
+	27, 15, 15, 27},
+	6
+};
+
+/** Older Apple IIGS AGI instrument set. Used only by Space Quest I (AGI v1.002). */
+static const InstrumentSetInfo instSetV1 = {
+	1192, 26, "7ee16bbc135171ffd6b9120cc7ff1af2", "edd3bf8905d9c238e02832b732fb2e18", progToInstMappingV1
+};
+
+/** Newer Apple IIGS AGI instrument set (AGI v1.003+). Used by all others than Space Quest I. */
+static const InstrumentSetInfo instSetV2 = {
+	1292, 28, "b7d428955bb90721996de1cbca25e768", "c05fb0b0e11deefab58bc68fbd2a3d07", progToInstMappingV2
+};
+
+/** Information about different Apple IIGS AGI executables. */
+static const IIgsExeInfo IIgsExeInfos[] = {
+	{GID_SQ1,      "SQ",   0x1002, 138496, 0x80AD, instSetV1},
+	{GID_LSL1,     "LL",   0x1003, 141003, 0x844E, instSetV2},
+	{GID_AGIDEMO,  "DEMO", 0x1005, 141884, 0x8469, instSetV2},
+	{GID_KQ1,      "KQ",   0x1006, 141894, 0x8469, instSetV2},
+	{GID_PQ1,      "PQ",   0x1007, 141882, 0x8469, instSetV2},
+	{GID_MIXEDUP,  "MG",   0x1013, 142552, 0x84B7, instSetV2},
+	{GID_KQ2,      "KQ2",  0x1013, 143775, 0x84B7, instSetV2},
+	{GID_KQ3,      "KQ3",  0x1014, 144312, 0x84B7, instSetV2},
+	{GID_SQ2,      "SQ2",  0x1014, 107882, 0x6563, instSetV2},
+	{GID_MH1,      "MH",   0x2004, 147678, 0x8979, instSetV2},
+	{GID_KQ4,      "KQ4",  0x2006, 147652, 0x8979, instSetV2},
+	{GID_BC,       "BC",   0x3001, 148192, 0x8979, instSetV2},
+	{GID_GOLDRUSH, "GR",   0x3003, 148268, 0x8979, instSetV2}
+};
+
+void IIgsSoundMgr::stopSounds() {
+	// Stops all sounds on all MIDI channels
+	for (iterator iter = _midiChannels.begin(); iter != _midiChannels.end(); ++iter)
+		iter->stopSounds();
+}
+
+void SoundMgr::playSampleSound() {
+	if (_vm->_soundemu != SOUND_EMU_APPLE2GS) {
+		warning("Trying to play a sample but not using Apple IIGS sound emulation mode");
+		return;
+	}
+
+	if (_playingSound != -1)
+		_playing = _gsSound->activeSounds() > 0;
+}
+
+bool IIgsSoundMgr::playSampleSound(const IIgsSampleHeader &sampleHeader, const int8 *sample) {
+	stopSounds();
+	IIgsMidiChannel &channel = _midiChannels[kSfxMidiChannel];
+
+	channel.setInstrument(&sampleHeader.instrument, sample);
+	channel.setVolume(sampleHeader.volume);
+	channel.noteOn(sampleHeader.pitch, 64); // Use default velocity (i.e. 64)
+
+	return true;
+}
+
+void IIgsMidiChannel::stopSounds() {
+	// Stops all sounds on this single MIDI channel
+	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
+		iter->stop();
+
+	_gsChannels.clear();
+}
+
+void SoundMgr::playMidiSound() {
+	if (_disabledMidi)
+		return;
+
+	const uint8 *p;
+	uint8 parm1, parm2;
+	static uint8 cmd, ch;
+
+	if (_playingSound == -1 || _vm->_game.sounds[_playingSound] == NULL) {
+		warning("Error playing Apple IIGS MIDI sound resource");
+		_playing = false;
+
+		return;
+	}
+
+	IIgsMidi *midiObj = (IIgsMidi *) _vm->_game.sounds[_playingSound];
+
+	_playing = true;
+	p = midiObj->getPtr();
+
+	midiObj->_soundBufTicks++;
+
+	while (true) {
+		uint8 readByte = *p;
+
+		// Check for end of MIDI sequence marker (Can also be here before delta-time)
+		if (readByte == MIDI_BYTE_STOP_SEQUENCE) {
+			debugC(3, kDebugLevelSound, "End of MIDI sequence (Before reading delta-time)");
+			_playing = false;
+
+			midiObj->rewind();
+
+			return;
+		} else if (readByte == MIDI_BYTE_TIMER_SYNC) {
+			debugC(3, kDebugLevelSound, "Timer sync");
+			p++; // Jump over the timer sync byte as it's not needed
+
+			continue;
+		}
+
+		uint8 deltaTime = readByte;
+		if (midiObj->_midiTicks + deltaTime > midiObj->_soundBufTicks) {
+			break;
+		}
+		midiObj->_midiTicks += deltaTime;
+		p++; // Jump over the delta-time byte as it was already taken care of
+
+		// Check for end of MIDI sequence marker (This time it after reading delta-time)
+		if (*p == MIDI_BYTE_STOP_SEQUENCE) {
+			debugC(3, kDebugLevelSound, "End of MIDI sequence (After reading delta-time)");
+			_playing = false;
+
+			midiObj->rewind();
+
+			return;
+		}
+
+		// Separate byte into command and channel if it's a command byte.
+		// Otherwise use running status (i.e. previously set command and channel).
+		if (*p & 0x80) {
+			cmd = *p++;
+			ch = cmd & 0x0f;
+			cmd >>= 4;
+		}
+
+		switch (cmd) {
+		case MIDI_CMD_NOTE_OFF:
+			parm1 = *p++;
+			parm2 = *p++;
+			_gsSound->midiNoteOff(ch, parm1, parm2);
+			break;
+		case MIDI_CMD_NOTE_ON:
+			parm1 = *p++;
+			parm2 = *p++;
+			_gsSound->midiNoteOn(ch, parm1, parm2);
+			break;
+		case MIDI_CMD_CONTROLLER:
+			parm1 = *p++;
+			parm2 = *p++;
+			_gsSound->midiController(ch, parm1, parm2);
+			break;
+		case MIDI_CMD_PROGRAM_CHANGE:
+			parm1 = *p++;
+			_gsSound->midiProgramChange(ch, parm1);
+			break;
+		case MIDI_CMD_PITCH_WHEEL:
+			parm1 = *p++;
+			parm2 = *p++;
+
+			uint16 wheelPos = ((parm2 & 0x7F) << 7) | (parm1 & 0x7F); // 14-bit value
+			_gsSound->midiPitchWheel(wheelPos);
+			break;
+		}
+	}
+
+	midiObj->setPtr(p);
+}
+
+void IIgsSoundMgr::midiNoteOff(uint8 channel, uint8 note, uint8 velocity) {
+	_midiChannels[channel].noteOff(note, velocity);
+	debugC(3, kDebugLevelSound, "note off, channel %02x, note %02x, velocity %02x", channel, note, velocity);
+}
+
+void IIgsSoundMgr::midiNoteOn(uint8 channel, uint8 note, uint8 velocity) {
+	_midiChannels[channel].noteOn(note, velocity);
+	debugC(3, kDebugLevelSound, "note  on, channel %02x, note %02x, velocity %02x", channel, note, velocity);
+}
+
+// TODO: Check if controllers behave differently on different MIDI channels
+// TODO: Doublecheck what other controllers than the volume controller do
+void IIgsSoundMgr::midiController(uint8 channel, uint8 controller, uint8 value) {
+	IIgsMidiChannel &midiChannel = _midiChannels[channel];
+
+	// The tested Apple IIGS AGI MIDI resources only used
+	// controllers 0 (Bank select?), 7 (Volume) and 64 (Sustain On/Off).
+	// Controller 0's parameter was in range 94-127,
+	// controller 7's parameter was in range 0-127 and
+	// controller 64's parameter was always 0 (i.e. sustain off).
+	bool unimplemented = false;
+	switch (controller) {
+	case 7: // Volume
+		midiChannel.setVolume(value);
+		break;
+	default:
+		unimplemented = true;
+		break;
+	}
+	debugC(3, kDebugLevelSound, "controller %02x, ch %02x, val %02x%s", controller, channel, value, unimplemented ? " (Unimplemented)" : "");
+}
+
+void IIgsSoundMgr::midiProgramChange(uint8 channel, uint8 program) {
+	_midiChannels[channel].setInstrument(getInstrument(program), _wave.begin());
+	debugC(3, kDebugLevelSound, "program change %02x, channel %02x", program, channel);
+}
+
+void IIgsSoundMgr::midiPitchWheel(uint8 wheelPos) {
+	// In all the tested Apple IIGS AGI MIDI resources
+	// pitch wheel commands always used 0x2000 (Center position).
+	// Therefore it should be quite safe to ignore this command.
+	debugC(3, kDebugLevelSound, "pitch wheel position %04x (Unimplemented)", wheelPos);
+}
+
+IIgsSoundMgr::IIgsSoundMgr() {
+	_midiChannels.resize(16); // Set the amount of available MIDI channels
+}
+
+const IIgsInstrumentHeader* IIgsSoundMgr::getInstrument(uint8 program) const {
+	return &_instruments[_midiProgToInst->map(program)];
+}
+
+void IIgsSoundMgr::setProgramChangeMapping(const MidiProgramChangeMapping *mapping) {
+	_midiProgToInst = mapping;
+}
+
+void IIgsSoundMgr::removeStoppedSounds() {
+	for (Common::Array<IIgsMidiChannel>::iterator iter = _midiChannels.begin(); iter != _midiChannels.end(); ++iter)
+		iter->removeStoppedSounds();
+}
+
+void IIgsMidiChannel::removeStoppedSounds() {
+	for (int i = _gsChannels.size() - 1; i >= 0; i--)
+		if (!_gsChannels[i].playing())
+			_gsChannels.remove_at(i);
+}
+
+uint IIgsSoundMgr::activeSounds() const {
+	uint result = 0;
+
+	for (Common::Array<IIgsMidiChannel>::const_iterator iter = _midiChannels.begin(); iter != _midiChannels.end(); ++iter)
+		result += iter->activeSounds();
+
+	return result;
+}
+
+uint IIgsMidiChannel::activeSounds() const {
+	uint result = 0;
+
+	for (const_iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
+		if (!iter->end)
+			result++;
+
+	return result;
+}
+
+void IIgsMidiChannel::setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample) {
+	_instrument = instrument;
+	_sample = sample;
+
+	// Set program on each Apple IIGS channel playing on this MIDI channel
+	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
+		iter->setInstrument(instrument, sample);
+}
+
+void IIgsMidiChannel::setVolume(uint8 volume) {
+	_volume = volume;
+
+	// Set volume on each Apple IIGS channel playing on this MIDI channel
+	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
+		iter->setChannelVolume(volume);
+}
+
+void IIgsMidiChannel::noteOff(uint8 note, uint8 velocity) {
+	// Go through all the notes playing on this MIDI channel
+	// and turn off the ones that are playing the given note
+	for (iterator iter = _gsChannels.begin(); iter != _gsChannels.end(); ++iter)
+		if (iter->origNote == note)
+			iter->noteOff(velocity);
+}
+
+void IIgsMidiChannel::noteOn(uint8 note, uint8 velocity) {
+	IIgsChannelInfo channel;
+
+	// Use the default channel volume and instrument
+	channel.setChannelVolume(_volume);
+	channel.setInstrument(_instrument, _sample);
+
+	// Set the note on and save the channel
+	channel.noteOn(note, velocity);
+	_gsChannels.push_back(channel);
+}
+
+void IIgsChannelInfo::rewind() {
+	this->envVol = this->startEnvVol;
+	this->envSeg = 0;
+	this->pos = intToFrac(0);
+}
+
+void IIgsChannelInfo::setChannelVolume(uint8 volume) {
+	this->chanVol = intToFrac(volume);
+}
+
+void IIgsChannelInfo::setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample) {
+	assert(instrument != NULL && sample != NULL);
+	this->ins = instrument;
+	this->unrelocatedSample = sample;
+}
+
+// TODO/FIXME: Implement correctly and fully (Take velocity into account etc)
+void IIgsChannelInfo::noteOn(uint8 noteParam, uint8 velocity) {
+	this->origNote = noteParam;
+	this->startEnvVol = intToFrac(0);
+	rewind();
+
+	const IIgsWaveInfo *waveInfo = NULL;
+
+	for (uint i = 0; i < ins->oscList.count; i++)
+		if (ins->oscList(i).waves[0].top >= noteParam)
+			waveInfo = &ins->oscList(i).waves[0];
+
+	assert(waveInfo != NULL);
+
+	this->relocatedSample = this->unrelocatedSample + waveInfo->addr;
+	this->posAdd  = intToFrac(0);
+	this->note    = intToFrac(noteParam) + doubleToFrac(waveInfo->relPitch/256.0);
+	this->vol     = doubleToFrac(fracToDouble(this->envVol) * fracToDouble(this->chanVol) / 127.0);
+	this->loop    = (waveInfo->mode == OSC_MODE_LOOP);
+	this->size    = waveInfo->size - waveInfo->addr;
+	this->end     = waveInfo->halt;
+}
+
+// TODO/FIXME: Implement correctly and fully (Take release time and velocity into account etc)
+void IIgsChannelInfo::noteOff(uint8 velocity) {
+	this->loop = false;
+	this->envSeg = ins->relseg;
+}
+
+void IIgsChannelInfo::stop() {
+	this->end = true;
+}
+
+bool IIgsChannelInfo::playing() {
+	return !this->end;
+}
+
+/**
+ * Finds information about an Apple IIGS AGI executable based on the game ID.
+ * @return A non-null IIgsExeInfo pointer if successful, otherwise NULL.
+ */
+const IIgsExeInfo *SoundMgr::getIIgsExeInfo(enum AgiGameID gameid) const {
+	for (int i = 0; i < ARRAYSIZE(IIgsExeInfos); i++)
+		if (IIgsExeInfos[i].gameid == gameid)
+			return &IIgsExeInfos[i];
+	return NULL;
+}
+
+bool IIgsSoundMgr::loadInstrumentHeaders(const Common::FSNode &exePath, const IIgsExeInfo &exeInfo) {
+	bool loadedOk = false; // Was loading successful?
+	Common::File file;
+
+	// Open the executable file and check that it has correct size
+	file.open(exePath);
+	if (file.size() != (int32)exeInfo.exeSize) {
+		debugC(3, kDebugLevelSound, "Apple IIGS executable (%s) has wrong size (Is %d, should be %d)",
+			exePath.getPath().c_str(), file.size(), exeInfo.exeSize);
+	}
+
+	// Read the whole executable file into memory
+	Common::SharedPtr<Common::MemoryReadStream> data(file.readStream(file.size()));
+	file.close();
+
+	// Check that we got enough data to be able to parse the instruments
+	if (data && data->size() >= (int32)(exeInfo.instSetStart + exeInfo.instSet.byteCount)) {
+		// Check instrument set's length (The info's saved in the executable)
+		data->seek(exeInfo.instSetStart - 4);
+		uint16 instSetByteCount = data->readUint16LE();
+		if (instSetByteCount != exeInfo.instSet.byteCount) {
+			debugC(3, kDebugLevelSound, "Wrong instrument set size (Is %d, should be %d) in Apple IIGS executable (%s)",
+				instSetByteCount, exeInfo.instSet.byteCount, exePath.getPath().c_str());
+		}
+
+		// Check instrument set's md5sum
+		data->seek(exeInfo.instSetStart);
+
+		char md5str[32+1];
+		Common::md5_file_string(*data, md5str, exeInfo.instSet.byteCount);
+		if (scumm_stricmp(md5str, exeInfo.instSet.md5)) {
+			warning("Unknown Apple IIGS instrument set (md5: %s) in %s, trying to use it nonetheless",
+				md5str, exePath.getPath().c_str());
+		}
+
+		// Read in the instrument set one instrument at a time
+		data->seek(exeInfo.instSetStart);
+
+		// Load the instruments
+		_instruments.clear();
+		_instruments.reserve(exeInfo.instSet.instCount);
+
+		IIgsInstrumentHeader instrument;
+		for (uint i = 0; i < exeInfo.instSet.instCount; i++) {
+			if (!instrument.read(*data)) {
+				warning("Error loading Apple IIGS instrument (%d. of %d) from %s, not loading more instruments",
+					i + 1, exeInfo.instSet.instCount, exePath.getPath().c_str());
+				break;
+			}
+			_instruments.push_back(instrument); // Add the successfully loaded instrument to the instruments array
+		}
+
+		// Loading was successful only if all instruments were loaded successfully
+		loadedOk = (_instruments.size() == exeInfo.instSet.instCount);
+	} else // Couldn't read enough data from the executable file
+		warning("Error loading instruments from Apple IIGS executable (%s)", exePath.getPath().c_str());
+
+	return loadedOk;
+}
+
+bool IIgsSoundMgr::loadWaveFile(const Common::FSNode &wavePath, const IIgsExeInfo &exeInfo) {
+	Common::File file;
+
+	// Open the wave file and read it into memory
+	file.open(wavePath);
+	Common::SharedPtr<Common::MemoryReadStream> uint8Wave(file.readStream(file.size()));
+	file.close();
+
+	// Check that we got the whole wave file
+	if (uint8Wave && uint8Wave->size() == SIERRASTANDARD_SIZE) {
+		// Check wave file's md5sum
+		char md5str[32+1];
+		Common::md5_file_string(*uint8Wave, md5str, SIERRASTANDARD_SIZE);
+		if (scumm_stricmp(md5str, exeInfo.instSet.waveFileMd5)) {
+			warning("Unknown Apple IIGS wave file (md5: %s, game: %s).\n" \
+				"Please report the information on the previous line to the ScummVM team.\n" \
+				"Using the wave file as it is - music may sound weird", md5str, exeInfo.exePrefix);
+		}
+
+		uint8Wave->seek(0); // Seek wave to its start
+		// Convert the wave file from 8-bit unsigned to 8-bit signed and save the result
+		_wave.resize(uint8Wave->size());
+		return SoundMgr::convertWave(*uint8Wave, _wave.begin(), uint8Wave->size());
+	} else { // Couldn't read the wave file or it had incorrect size
+		warning("Error loading Apple IIGS wave file (%s), not loading instruments", wavePath.getPath().c_str());
+		return false;
+	}
+}
+
+/**
+ * A function object (i.e. a functor) for testing if a Common::FSNode
+ * object's name is equal (Ignoring case) to a string or to at least
+ * one of the strings in a list of strings. Can be used e.g. with find_if().
+ */
+struct fsnodeNameEqualsIgnoreCase : public Common::UnaryFunction<const Common::FSNode&, bool> {
+// FIXME: This should be replaced; use SearchMan instead
+	fsnodeNameEqualsIgnoreCase(const Common::StringArray &str) : _str(str) {}
+	fsnodeNameEqualsIgnoreCase(const Common::String str) { _str.push_back(str); }
+	bool operator()(const Common::FSNode &param) const {
+		for (Common::StringArray::const_iterator iter = _str.begin(); iter != _str.end(); ++iter)
+			if (param.getName().equalsIgnoreCase(*iter))
+				return true;
+		return false;
+	}
+private:
+	Common::StringArray _str;
+};
+
+bool SoundMgr::loadInstruments() {
+	// Check that the platform is Apple IIGS, as only it uses custom instruments
+	if (_vm->getPlatform() != Common::kPlatformApple2GS) {
+		debugC(3, kDebugLevelSound, "Platform isn't Apple IIGS so not loading any instruments");
+		return true;
+	}
+
+	// Get info on the particular Apple IIGS AGI game's executable
+	const IIgsExeInfo *exeInfo = getIIgsExeInfo((enum AgiGameID) _vm->getGameID());
+	if (exeInfo == NULL) {
+		warning("Unsupported Apple IIGS game, not loading instruments");
+		return false;
+	}
+
+	// List files in the game path
+	Common::FSList fslist;
+	Common::FSNode dir(ConfMan.get("path"));
+	if (!dir.getChildren(fslist, Common::FSNode::kListFilesOnly)) {
+		warning("Invalid game path (\"%s\"), not loading Apple IIGS instruments", dir.getPath().c_str());
+		return false;
+	}
+
+	// Populate executable filenames list (Long filename and short filename) for searching
+	Common::StringArray exeNames;
+	exeNames.push_back(Common::String(exeInfo->exePrefix) + ".SYS16");
+	exeNames.push_back(Common::String(exeInfo->exePrefix) + ".SYS");
+
+	// Populate wave filenames list (Long filename and short filename) for searching
+	Common::StringArray waveNames;
+	waveNames.push_back("SIERRASTANDARD");
+	waveNames.push_back("SIERRAST");
+
+	// Search for the executable file and the wave file (i.e. check if any of the filenames match)
+	Common::FSList::const_iterator exeFsnode, waveFsnode;
+	exeFsnode  = Common::find_if(fslist.begin(), fslist.end(), fsnodeNameEqualsIgnoreCase(exeNames));
+	waveFsnode = Common::find_if(fslist.begin(), fslist.end(), fsnodeNameEqualsIgnoreCase(waveNames));
+
+	// Make sure that we found the executable file
+	if (exeFsnode == fslist.end()) {
+		warning("Couldn't find Apple IIGS game executable (%s), not loading instruments", exeNames.begin()->c_str());
+		return false;
+	}
+
+	// Make sure that we found the wave file
+	if (waveFsnode == fslist.end()) {
+		warning("Couldn't find Apple IIGS wave file (%s), not loading instruments", waveNames.begin()->c_str());
+		return false;
+	}
+
+	// Set the MIDI program change to instrument number mapping and
+	// load the instrument headers and their sample data.
+	// None of the tested SIERRASTANDARD-files have zeroes in them so
+	// there's no need to check for prematurely ending samples here.
+	_gsSound->setProgramChangeMapping(&exeInfo->instSet.progToInst);
+	return _gsSound->loadWaveFile(*waveFsnode, *exeInfo) && _gsSound->loadInstrumentHeaders(*exeFsnode, *exeInfo);
+}
+
+} // End of namespace Agi
diff --git a/engines/agi/sound_2gs.h b/engines/agi/sound_2gs.h
new file mode 100644
index 0000000000..3669d29955
--- /dev/null
+++ b/engines/agi/sound_2gs.h
@@ -0,0 +1,311 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef AGI_SOUND_2GS_H
+#define AGI_SOUND_2GS_H
+
+#include "common/frac.h"
+
+namespace Agi {
+
+// Apple IIGS MIDI uses 60 ticks per second (Based on tests with Apple IIGS
+// KQ1 and SQ1 under MESS 0.124a). So we make the audio buffer size to be a
+// 1/60th of a second in length. That should be getSampleRate() / 60 samples
+// in length but as getSampleRate() is always 22050 at the moment we just use
+// the hardcoded value of 368 (22050/60 = 367.5 which rounds up to 368).
+// FIXME: Use getSampleRate() / 60 rather than a hardcoded value
+#define IIGS_BUFFER_SIZE 368
+
+// MIDI command values (Shifted right by 4 so they're in the lower nibble)
+#define MIDI_CMD_NOTE_OFF        0x08
+#define MIDI_CMD_NOTE_ON         0x09
+#define MIDI_CMD_CONTROLLER      0x0B
+#define MIDI_CMD_PROGRAM_CHANGE  0x0C
+#define MIDI_CMD_PITCH_WHEEL     0x0E
+// Whole MIDI byte values (Command and channel info together)
+#define MIDI_BYTE_STOP_SEQUENCE  0xFC
+#define MIDI_BYTE_TIMER_SYNC     0xF8
+
+struct IIgsEnvelopeSegment {
+	uint8 bp;
+	uint16 inc; ///< 8b.8b fixed point, very probably little endian
+};
+
+#define ENVELOPE_SEGMENT_COUNT 8
+struct IIgsEnvelope {
+	IIgsEnvelopeSegment seg[ENVELOPE_SEGMENT_COUNT];
+
+	/** Reads an Apple IIGS envelope from then given stream. */
+	bool read(Common::SeekableReadStream &stream);
+};
+
+// 2**(1/12) i.e. the 12th root of 2
+#define SEMITONE 1.059463094359295
+
+// C6's frequency is A4's (440 Hz) frequency but one full octave and three semitones higher
+// i.e. C6_FREQ = 440 * pow(2.0, 15/12.0)
+#define C6_FREQ 1046.502261202395
+
+// Size of the SIERRASTANDARD file (i.e. the wave file i.e. the sample data used by the instruments).
+#define SIERRASTANDARD_SIZE 65536
+
+// Maximum number of instruments in an Apple IIGS instrument set.
+// Chosen empirically based on Apple IIGS AGI game data, increase if needed.
+#define MAX_INSTRUMENTS 28
+
+struct IIgsWaveInfo {
+	uint8 top;
+	uint addr;
+	uint size;
+// Oscillator channel
+#define OSC_CHANNEL_RIGHT 0
+#define OSC_CHANNEL_LEFT  1
+	uint channel;
+// Oscillator mode
+#define OSC_MODE_LOOP     0
+#define OSC_MODE_ONESHOT  1
+#define OSC_MODE_SYNC_AM  2
+#define OSC_MODE_SWAP     3
+	uint mode;
+	bool halt;
+	int16 relPitch; ///< Relative pitch in semitones (Signed 8b.8b fixed point)
+
+	/** Reads an Apple IIGS wave information structure from the given stream. */
+	bool read(Common::SeekableReadStream &stream, bool ignoreAddr = false);
+	bool finalize(Common::SeekableReadStream &uint8Wave);
+};
+
+// Number of waves per Apple IIGS sound oscillator
+#define WAVES_PER_OSCILLATOR 2
+
+/** An Apple IIGS sound oscillator. Consists always of two waves. */
+struct IIgsOscillator {
+	IIgsWaveInfo waves[WAVES_PER_OSCILLATOR];
+
+	bool finalize(Common::SeekableReadStream &uint8Wave);
+};
+
+// Maximum number of oscillators in an Apple IIGS instrument.
+// Chosen empirically based on Apple IIGS AGI game data, increase if needed.
+#define MAX_OSCILLATORS 4
+
+/** An Apple IIGS sound oscillator list. */
+struct IIgsOscillatorList {
+	uint count; ///< Oscillator count
+	IIgsOscillator osc[MAX_OSCILLATORS]; ///< The oscillators
+
+	/** Indexing operators for easier access to the oscillators. */
+	const IIgsOscillator &operator()(uint index) const { return osc[index]; }
+	IIgsOscillator &operator()(uint index) { return osc[index]; }
+
+	/** Reads an Apple IIGS oscillator list from the given stream. */
+	bool read(Common::SeekableReadStream &stream, uint oscillatorCount, bool ignoreAddr = false);
+	bool finalize(Common::SeekableReadStream &uint8Wave);
+};
+
+struct IIgsInstrumentHeader {
+	IIgsEnvelope env;
+	uint8 relseg;
+	uint8 bendrange;
+	uint8 vibdepth;
+	uint8 vibspeed;
+	IIgsOscillatorList oscList;
+
+	/**
+	 * Read an Apple IIGS instrument header from the given stream.
+	 * @param stream The source stream from which to read the data.
+	 * @param ignoreAddr Should we ignore wave infos' wave address variable's value?
+	 * @return True if successful, false otherwise.
+	 */
+	bool read(Common::SeekableReadStream &stream, bool ignoreAddr = false);
+	bool finalize(Common::SeekableReadStream &uint8Wave);
+};
+
+struct IIgsSampleHeader {
+	uint16 type;
+	uint8  pitch; ///< Logarithmic, base is 2**(1/12), unknown multiplier (Possibly in range 1040-1080)
+	uint8  unknownByte_Ofs3; // 0x7F in Gold Rush's sound resource 60, 0 in all others.
+	uint8  volume; ///< Current guess: Logarithmic in 6 dB steps
+	uint8  unknownByte_Ofs5; ///< 0 in all tested samples.
+	uint16 instrumentSize; ///< Little endian. 44 in all tested samples. A guess.
+	uint16 sampleSize; ///< Little endian. Accurate in all tested samples excluding Manhunter I's sound resource 16.
+	IIgsInstrumentHeader instrument;
+
+	/**
+	 * Read an Apple IIGS AGI sample header from the given stream.
+	 * @param stream The source stream from which to read the data.
+	 * @return True if successful, false otherwise.
+	 */
+	bool read(Common::SeekableReadStream &stream);
+	bool finalize(Common::SeekableReadStream &uint8Wave);
+};
+
+struct IIgsChannelInfo {
+	const IIgsInstrumentHeader *ins; ///< Instrument info
+	const int8 *relocatedSample; ///< Source sample data (8-bit signed format) using relocation
+	const int8 *unrelocatedSample; ///< Source sample data (8-bit signed format) without relocation
+	frac_t pos;     ///< Current sample position
+	frac_t posAdd;  ///< Current sample position adder (Calculated using note, vibrato etc)
+	uint8 origNote; ///< The original note without the added relative pitch
+	frac_t note;    ///< Note (With the added relative pitch)
+	frac_t vol;     ///< Current volume (Takes both channel volume and enveloping into account)
+	frac_t chanVol; ///< Channel volume
+	frac_t startEnvVol; ///< Starting envelope volume
+	frac_t envVol;  ///< Current envelope volume
+	uint   envSeg;  ///< Current envelope segment
+	uint   size;    ///< Sample size
+	bool   loop;    ///< Should we loop the sample?
+	bool   end;     ///< Has the playing ended?
+
+	void rewind(); ///< Rewinds the sound playing on this channel to its start
+	void setChannelVolume(uint8 volume); ///< Sets the channel volume
+	void setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample); ///< Sets the instrument to be used on this channel
+	void noteOn(uint8 noteParam, uint8 velocity); ///< Starts playing a note on this channel
+	void noteOff(uint8 velocity); ///< Releases the note on this channel
+	void stop(); ///< Stops the note playing on this channel instantly
+	bool playing(); ///< Is there a note playing on this channel?
+};
+
+class IIgsMidi : public AgiSound {
+public:
+	IIgsMidi(uint8 *data, uint32 len, int resnum, SoundMgr &manager);
+	~IIgsMidi() { if (_data != NULL) free(_data); }
+	virtual uint16 type() { return _type; }
+	virtual const uint8 *getPtr() { return _ptr; }
+	virtual void setPtr(const uint8 *ptr) { _ptr = ptr; }
+	virtual void rewind() { _ptr = _data + 2; _midiTicks = _soundBufTicks = 0; }
+protected:
+	uint8 *_data; ///< Raw sound resource data
+	const uint8 *_ptr; ///< Pointer to the current position in the MIDI data
+	uint32 _len; ///< Length of the raw sound resource
+	uint16 _type; ///< Sound resource type
+public:
+	uint _midiTicks; ///< MIDI song position in ticks (1/60ths of a second)
+	uint _soundBufTicks; ///< Sound buffer position in ticks (1/60ths of a second)
+};
+
+class IIgsSample : public AgiSound {
+public:
+	IIgsSample(uint8 *data, uint32 len, int resnum, SoundMgr &manager);
+	~IIgsSample() { delete[] _sample; }
+	virtual uint16 type() { return _header.type; }
+	const IIgsSampleHeader &getHeader() const { return _header; }
+	const int8 *getSample() const { return _sample; }
+protected:
+	IIgsSampleHeader _header; ///< Apple IIGS AGI sample header
+	int8 *_sample;           ///< Sample data (8-bit signed format)
+};
+
+/** Apple IIGS MIDI program change to instrument number mapping. */
+struct MidiProgramChangeMapping {
+	byte midiProgToInst[44]; ///< Lookup table for the MIDI program number to instrument number mapping
+	byte undefinedInst; ///< The undefined instrument number
+
+	// Maps the MIDI program number to an instrument number
+	byte map(uint midiProg) const {
+		return midiProg < ARRAYSIZE(midiProgToInst) ? midiProgToInst[midiProg] : undefinedInst;
+	}
+};
+
+/** Apple IIGS AGI instrument set information. */
+struct InstrumentSetInfo {
+	uint byteCount;          ///< Length of the whole instrument set in bytes
+	uint instCount;          ///< Amount of instrument in the set
+	const char *md5;         ///< MD5 hex digest of the whole instrument set
+	const char *waveFileMd5; ///< MD5 hex digest of the wave file (i.e. the sample data used by the instruments)
+	const MidiProgramChangeMapping &progToInst; ///< Program change to instrument number mapping
+};
+
+/** Apple IIGS AGI executable file information. */
+struct IIgsExeInfo {
+	enum AgiGameID gameid;            ///< Game ID
+	const char *exePrefix;            ///< Prefix of the Apple IIGS AGI executable (e.g. "SQ", "PQ", "KQ4" etc)
+	uint agiVer;                      ///< Apple IIGS AGI version number, not strictly needed
+	uint exeSize;                     ///< Size of the Apple IIGS AGI executable file in bytes
+	uint instSetStart;                ///< Starting offset of the instrument set inside the executable file
+	const InstrumentSetInfo &instSet; ///< Information about the used instrument set
+};
+
+class IIgsMidiChannel {
+public:
+	IIgsMidiChannel() : _instrument(0), _sample(0), _volume(0) {}
+	uint activeSounds() const; ///< How many active sounds are playing?
+	void setInstrument(const IIgsInstrumentHeader *instrument, const int8 *sample);
+	void setVolume(uint8 volume);
+	void noteOff(uint8 note, uint8 velocity);
+	void noteOn(uint8 note, uint8 velocity);
+	void stopSounds(); ///< Clears the channel of any sounds
+	void removeStoppedSounds(); ///< Removes all stopped sounds from this MIDI channel
+public:
+	typedef Common::Array<IIgsChannelInfo>::const_iterator const_iterator;
+	typedef Common::Array<IIgsChannelInfo>::iterator iterator;
+	Common::Array<IIgsChannelInfo> _gsChannels;	///< Apple IIGS channels playing on this MIDI channel
+protected:
+	const IIgsInstrumentHeader *_instrument;	///< Instrument used on this MIDI channel
+	const int8 *_sample;						///< Sample data used on this MIDI channel
+	uint8 _volume;								///< MIDI controller number 7 (Volume)
+};
+
+/**
+ * Class for managing Apple IIGS sound channels.
+ * TODO: Check what instruments are used by default on the MIDI channels
+ * FIXME: Some instrument choices sound wrong
+ */
+class IIgsSoundMgr {
+public:
+	typedef Common::Array<IIgsMidiChannel>::const_iterator const_iterator;
+	typedef Common::Array<IIgsMidiChannel>::iterator iterator;
+	static const uint kSfxMidiChannel = 0; ///< The MIDI channel used for playing sound effects
+public:
+	// For initializing
+	IIgsSoundMgr();
+	void setProgramChangeMapping(const MidiProgramChangeMapping *mapping);
+	bool loadInstrumentHeaders(const Common::FSNode &exePath, const IIgsExeInfo &exeInfo);
+	bool loadWaveFile(const Common::FSNode &wavePath, const IIgsExeInfo &exeInfo);
+	// Miscellaneous methods
+	uint activeSounds() const; ///< How many active sounds are playing?
+	void stopSounds(); ///< Stops all sounds
+	void removeStoppedSounds(); ///< Removes all stopped sounds from the MIDI channels
+	// For playing Apple IIGS AGI samples (Sound effects etc)
+	bool playSampleSound(const IIgsSampleHeader &sampleHeader, const int8 *sample);
+	// MIDI commands
+	void midiNoteOff(uint8 channel, uint8 note, uint8 velocity);
+	void midiNoteOn(uint8 channel, uint8 note, uint8 velocity);
+	void midiController(uint8 channel, uint8 controller, uint8 value);
+	void midiProgramChange(uint8 channel, uint8 program);
+	void midiPitchWheel(uint8 wheelPos);
+protected:
+	const IIgsInstrumentHeader* getInstrument(uint8 program) const;
+public:
+	Common::Array<IIgsMidiChannel> _midiChannels;		///< Information about each MIDI channel
+protected:
+	Common::Array<int8> _wave;							///< Sample data used by the Apple IIGS MIDI instruments
+	const MidiProgramChangeMapping *_midiProgToInst;	///< MIDI program change to instrument number mapping
+	Common::Array<IIgsInstrumentHeader> _instruments;	///< Instruments used by the Apple IIGS AGI
+};
+
+} // End of namespace Agi
+
+#endif /* AGI_SOUND_2GS_H */