SCI/new music code: Fixed the code that handles mixed Adlib/MIDI mode, and added better comments on what it actually does

svn-id: r46981

2 files changed, 9 insertions, 10 deletions

diff --git a/engines/sci/sfx/music.cpp b/engines/sci/sfx/music.cpp
index 6f28aa0718..30721f0531 100644
--- a/engines/sci/sfx/music.cpp
+++ b/engines/sci/sfx/music.cpp
@@ -307,20 +307,17 @@ void SciMusic::soundInitSnd(MusicEntry *pSnd) {
 		track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_MT32);
 		break;
 	default:
+		// Should never occur
+		error("soundInitSnd: Unknown MIDI type");
 		break;
 	}
 
-	// attempting to select default MT-32/Roland track
-	if (!track)
-		track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_MT32);
 	if (track) {
-		// if MIDI device is selected but there is no digital track in sound resource
+		// If MIDI device is selected but there is no digital track in sound resource
 		// try to use adlib's digital sample if possible
-		if (_midiType <= MD_MT32 && track->digitalChannelNr == -1 && _bMultiMidi) {
-			if (pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB)->digitalChannelNr != -1)
-				track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB);
-		}
-		// play digital sample
+		if (_bMultiMidi && pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB)->digitalChannelNr != -1)
+			track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB);
+		// Play digital sample
 		if (track->digitalChannelNr != -1) {
 			byte *channelData = track->channels[track->digitalChannelNr].data;
 			delete pSnd->pStreamAud;
diff --git a/engines/sci/sfx/music.h b/engines/sci/sfx/music.h
index 7f9bd413bc..0b7d880112 100644
--- a/engines/sci/sfx/music.h
+++ b/engines/sci/sfx/music.h
@@ -203,7 +203,9 @@ protected:
 	MidiDriverType _midiType;
 
 	uint32 _dwTempo;
-	bool _bMultiMidi; // use adlib's digital track if midi track don't have one
+	// Mixed Adlib/MIDI mode: when enabled from the ScummVM sound options screen,
+	// and a sound has a digital track, the sound from the Adlib track is played
+	bool _bMultiMidi;
 private:
 	static void miditimerCallback(void *p);