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diff --git a/sound/softsynth/mt32/partial.h b/sound/softsynth/mt32/partial.h
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+/* Copyright (c) 2003-2004 Various contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef MT32EMU_PARTIAL_H
+#define MT32EMU_PARTIAL_H
+
+namespace MT32Emu {
+
+class Synth;
+struct NoteLookup;
+
+enum EnvelopeType {
+	EnvelopeType_amp = 0,
+	EnvelopeType_filt = 1,
+	EnvelopeType_pitch = 2
+};
+
+struct EnvelopeStatus {
+	Bit32s envpos;
+	Bit32s envstat;
+	Bit32s envbase;
+	Bit32s envdist;
+	Bit32s envsize;
+
+	bool sustaining;
+	bool decaying;
+	Bit32s prevlevel;
+
+	Bit32s counter;
+	Bit32s count;
+};
+
+// Class definition of MT-32 partials.  32 in all.
+class Partial {
+private:
+	Synth *synth;
+
+	int ownerPart; // -1 if unassigned
+	int mixType;
+	int structurePosition; // 0 or 1 of a structure pair
+	bool useNoisePair;
+
+	Bit16s myBuffer[MAX_SAMPLE_OUTPUT];
+
+	bool play;
+
+	// Keyfollowed note value
+#if MT32EMU_ACCURATENOTES == 1
+	NoteLookup noteLookupStorage;
+	float noteVal;
+#else
+	int noteVal;
+	int fineShift;
+#endif
+	const NoteLookup *noteLookup; // LUTs for this noteVal
+
+	// Keyfollowed filter values
+	int realVal;
+	int filtVal;
+
+	EnvelopeStatus envs[3];
+
+	int pulsewidth;
+
+	Bit32u lfoPos;
+	soundaddr partialOff;
+
+	Bit32u ampEnvVal;
+	Bit32u pitchEnvVal;
+
+	float history[32];
+
+	bool pitchSustain;
+
+	int loopPos;
+
+	dpoly *poly;
+
+	int bendShift;
+
+	Bit16s *mixBuffers(Bit16s *buf1, Bit16s *buf2, int len);
+	Bit16s *mixBuffersRingMix(Bit16s *buf1, Bit16s *buf2, int len);
+	Bit16s *mixBuffersRing(Bit16s *buf1, Bit16s *buf2, int len);
+	void mixBuffersStereo(Bit16s *buf1, Bit16s *buf2, Bit16s *outBuf, int len);
+
+	Bit32s getFiltEnvelope();
+	Bit32u getAmpEnvelope();
+	Bit32s getPitchEnvelope();
+
+	void initKeyFollow(int freqNum);
+
+public:
+	const PatchCache *patchCache;
+	PatchCache cachebackup;
+
+	Partial *pair;
+	bool alreadyOutputed;
+	Bit32u age;
+
+	Partial(Synth *synth);
+	~Partial();
+
+	int getOwnerPart();
+	bool isActive();
+	void activate(int part);
+	void deactivate(void);
+	void startPartial(dpoly *usePoly, const PatchCache *useCache, Partial *pairPartial);
+	void startDecay(EnvelopeType envnum, Bit32s startval);
+	void startDecayAll();
+	void setBend(float factor);
+	bool shouldReverb();
+
+	// Returns true only if data written to buffer
+	// This function (unlike the one below it) returns processed stereo samples
+	// made from combining this single partial with its pair, if it has one.
+	bool produceOutput(Bit16s * partialBuf, long length);
+
+	// This function produces mono sample output using the partial's private internal buffer
+	Bit16s *generateSamples(long length);
+};
+
+}
+
+#endif