--- np2/sound/adpcmc.c	2003/10/16 17:58:07	1.1
+++ np2/sound/adpcmc.c	2004/02/03 08:24:40	1.4
@@ -33,7 +33,9 @@ void adpcm_update(ADPCM ad) {
 
 	UINT32	addr;
 
-	ad->base = ADTIMING * (OPNA_CLOCK / 72) / adpcmcfg.rate;
+	if (adpcmcfg.rate) {
+		ad->base = ADTIMING * (OPNA_CLOCK / 72) / adpcmcfg.rate;
+	}
 	addr = LOADINTELWORD(ad->reg.delta);
 	addr = (addr * ad->base) >> 16;
 	if (addr < 0x80) {
@@ -44,10 +46,11 @@ void adpcm_update(ADPCM ad) {
 	ad->level = (ad->reg.level * adpcmcfg.vol) >> 4;
 }
 
-void adpcm_setreg(ADPCM ad, BYTE reg, BYTE value) {
+void adpcm_setreg(ADPCM ad, REG8 reg, REG8 value) {
 
 	UINT32	addr;
 
+	sound_sync();
 	((BYTE *)(&ad->reg))[reg] = value;
 	switch(reg) {
 		case 0x00:								// control1
@@ -113,7 +116,7 @@ void adpcm_setreg(ADPCM ad, BYTE reg, BY
 	}
 }
 
-BYTE adpcm_status(ADPCM ad) {
+REG8 adpcm_status(ADPCM ad) {
 
 	return(((ad->status | 8) & ad->mask) | ad->play);
 }