--- np2/sound/adpcmc.c	2003/10/20 06:36:33	1.2
+++ np2/sound/adpcmc.c	2005/02/07 14:46:12	1.6
@@ -6,7 +6,6 @@
 
 	ADPCMCFG	adpcmcfg;
 
-
 void adpcm_initialize(UINT rate) {
 
 	adpcmcfg.rate = rate;
@@ -20,8 +19,8 @@ void adpcm_setvol(UINT vol) {
 void adpcm_reset(ADPCM ad) {
 
 	ZeroMemory(ad, sizeof(_ADPCM));
-	ad->mask = 0;					// (BYTE)~0x1c;
-	ad->delta = 128;
+	ad->mask = 0;					// (UINT8)~0x1c;
+	ad->delta = 127;
 	STOREINTELWORD(ad->reg.stop, 0x0002);
 	STOREINTELWORD(ad->reg.limit, 0xffff);
 	ad->stop = 0x000060;
@@ -46,18 +45,19 @@ 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;
 
-	((BYTE *)(&ad->reg))[reg] = value;
+	sound_sync();
+	((UINT8 *)(&ad->reg))[reg] = value;
 	switch(reg) {
 		case 0x00:								// control1
 			if ((value & 0x80) && (!ad->play)) {
 				ad->play = 0x20;
 				ad->pos = ad->start;
 				ad->samp = 0;
-				ad->delta = 128;
+				ad->delta = 127;
 				ad->remain = 0;
 			}
 			if (value & 1) {
@@ -115,7 +115,7 @@ 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);
 }