Allow the four extra OPL3 waveforms to be used (untested)

player/snd_fm.c

@@ -432,13 +432,13 @@ void OPL_Patch(int c, const unsigned char *D)
 	OPL_Byte(KSL_LEVEL+        Ope, D[2]);
     OPL_Byte(ATTACK_DECAY+     Ope, D[4]);
     OPL_Byte(SUSTAIN_RELEASE+  Ope, D[6]);
-    OPL_Byte(WAVE_SELECT+      Ope, D[8]&3);// 6 high bits used elsewhere
+    OPL_Byte(WAVE_SELECT+      Ope, D[8]&7);// 5 high bits used elsewhere
 
     OPL_Byte(AM_VIB+         3+Ope, D[1]);
 	OPL_Byte(KSL_LEVEL+      3+Ope, D[3]);
     OPL_Byte(ATTACK_DECAY+   3+Ope, D[5]);
     OPL_Byte(SUSTAIN_RELEASE+3+Ope, D[7]);
-    OPL_Byte(WAVE_SELECT+    3+Ope, D[9]&3);// 6 high bits used elsewhere
+    OPL_Byte(WAVE_SELECT+    3+Ope, D[9]&7);// 5 high bits used elsewhere
 
     /* feedback, additive synthesis and Panning... */
     OPL_Byte(FEEDBACK_CONNECTION+oplc, 

schism/page_samples.c

@@ -797,14 +797,14 @@ static const struct {
 	{2,  7, B, 1, 4, 1 }, // carrier scale envelope flag
 	{2,  8, N, 3, 6, 2 }, // carrier level scaling (This is actually reversed bits...)
 	{2,  9, N, 1, 0, 4 }, // carrier frequency multiplier
-	{2, 10, N, 9, 0, 2 }, // carrier wave select
+	{2, 10, N, 9, 0, 3 }, // carrier wave select
 	{2, 11, B, 1, 6, 1 }, // carrier pitch vibrato
 	{2, 12, B, 1, 7, 1 }, // carrier volume vibrato
 
 	{3,  7, B, 0, 4, 1 }, // modulator scale envelope flag
 	{3,  8, N, 2, 6, 2 }, // modulator level scaling (This is actually reversed bits...)
 	{3,  9, N, 0, 0, 4 }, // modulator frequency multiplier
-	{3, 10, N, 8, 0, 2 }, // modulator wave select
+	{3, 10, N, 8, 0, 3 }, // modulator wave select
 	{3, 11, B, 0, 6, 1 }, // modulator pitch vibrato
 	{3, 12, B, 0, 7, 1 }, // modulator volume vibrato
 };