--- xmil/sound/opmgenc.c	2004/08/10 10:17:39	1.5
+++ xmil/sound/opmgenc.c	2005/02/04 06:42:12	1.7
@@ -1,4 +1,7 @@
 #include	"compiler.h"
+
+#if defined(SUPPORT_TURBOZ) || defined(SUPPORT_OPM)
+
 #include	<math.h>
 #include	"sound.h"
 #include	"sndctrl.h"
@@ -118,6 +121,11 @@ void opmgen_initialize(UINT rate) {
 	detune2table[3] = D2(3.0);
 }
 
+void opmgen_setvol(UINT vol) {
+
+	opmcfg.fmvol = vol;
+}
+
 
 // ----
 
@@ -467,3 +475,5 @@ void opmgen_setreg(REG8 reg, REG8 value)
 	}
 }
 
+#endif
+