diff --git a/src/burn/drv/pre90s/d_lwings.cpp b/src/burn/drv/pre90s/d_lwings.cpp
index 1598b87b1..4aa7dd4c5 100644
--- a/src/burn/drv/pre90s/d_lwings.cpp
+++ b/src/burn/drv/pre90s/d_lwings.cpp
@@ -868,6 +868,11 @@ inline static INT32 DrvSynchroniseStream(INT32 nSoundRate)
 }
 
 inline static INT32 DrvMSM5205SynchroniseStream(INT32 nSoundRate)
+{
+	return (INT64)((double)ZetTotalCycles() * nSoundRate / (nCyclesTotal[0] * 130));
+}
+
+inline static INT32 DrvMSM5205SynchroniseStreamAvengers(INT32 nSoundRate)
 {
 	return (INT64)((double)ZetTotalCycles() * nSoundRate / (nCyclesTotal[0] * 60));
 }
@@ -1033,7 +1038,7 @@ static INT32 TrojanInit()
 	ZetSetOutHandler(trojan_adpcm_out);
 	ZetClose();
 	
-	MSM5205Init(0, DrvMSM5205SynchroniseStream, 455000, NULL, MSM5205_SEX_4B, 1);
+	MSM5205Init(0, (avengers) ? DrvMSM5205SynchroniseStreamAvengers : DrvMSM5205SynchroniseStream, /*455000*/384000, NULL, MSM5205_SEX_4B, 1);
 	MSM5205SetRoute(0, 0.50, BURN_SND_ROUTE_BOTH);
 	MSM5205InUse = 1;
 
@@ -1472,13 +1477,13 @@ static INT32 DrvFrame()
 	}
 
 	INT32 nInterleave;
-	INT32 MSMIRQSlice[67];
+	INT32 MSMIRQSlice[134];
 	
 	if (MSM5205InUse) {
 		nInterleave = MSM5205CalcInterleave(0, 6000000);
 	
-		for (INT32 i = 0; i < 67; i++) {
-			MSMIRQSlice[i] = (INT32)((double)((nInterleave * (i + 1)) / 68));
+		for (INT32 i = 0; i < 133; i++) {
+			MSMIRQSlice[i] = (INT32)((double)((nInterleave * (i + 1)) / 134));
 		}
 	} else {
 		nInterleave = 16;
@@ -1497,7 +1502,7 @@ static INT32 DrvFrame()
 		nNext = (i + 1) * nCyclesTotal[nCurrentCPU] / nInterleave;
 		nCyclesSegment = nNext - nCyclesDone[nCurrentCPU];
 		nCyclesDone[nCurrentCPU] += ZetRun(nCyclesSegment);
-		if (interrupt_enable && i == (nInterleave - 1)) {
+		if (interrupt_enable && i == (nInterleave-1 /* * 242 / 256*/)) {
 			if (avengers & 1) {
 				ZetNmi();
 			} else {
@@ -1510,8 +1515,12 @@ static INT32 DrvFrame()
 		
 		nCurrentCPU = 1;
 		ZetOpen(nCurrentCPU);
-		BurnTimerUpdate(i * (nCyclesTotal[nCurrentCPU] / nInterleave));
-		if ((i % (nInterleave / 4)) == ((nInterleave / 4) - 1)) ZetSetIRQLine(0, ZET_IRQSTATUS_AUTO);
+		BurnTimerUpdate((i + 1) * (nCyclesTotal[nCurrentCPU] / nInterleave));
+		if ((i % (nInterleave / 4)) == ((nInterleave / 4) - 1)) {
+			ZetSetIRQLine(0, ZET_IRQSTATUS_ACK);
+			ZetRun(500);
+			ZetSetIRQLine(0, ZET_IRQSTATUS_NONE);
+		}
 		ZetClose();
 
 		if (MSM5205InUse) {
@@ -1520,7 +1529,7 @@ static INT32 DrvFrame()
 			nNext = (i + 1) * nCyclesTotal[nCurrentCPU] / nInterleave;
 			nCyclesSegment = nNext - nCyclesDone[nCurrentCPU];
 			nCyclesDone[nCurrentCPU] += ZetRun(nCyclesSegment);
-			for (INT32 j = 0; j < 67; j++) {
+			for (INT32 j = 0; j < 133; j++) {
 				if (i == MSMIRQSlice[j]) {
 					ZetSetIRQLine(0, ZET_IRQSTATUS_AUTO);
 					nCyclesDone[nCurrentCPU] += ZetRun(1000);