--- np2/win9x/soundmng.cpp	2006/12/24 00:52:29	1.12
+++ np2/win9x/soundmng.cpp	2007/10/28 16:01:35	1.15
@@ -14,6 +14,12 @@
 #include	"mt32snd.h"
 #endif
 
+#if defined(_M_IA64) || defined(_M_AMD64)
+#define	SOUNDBUFFERALIGN	(1 << 3)
+#else
+#define	SOUNDBUFFERALIGN	(1 << 2)
+#endif
+
 #if !defined(_WIN64)
 #ifdef __cplusplus
 extern "C" {
@@ -86,6 +92,7 @@ UINT soundmng_create(UINT rate, UINT ms)
 		(rate != 11025) && (rate != 22050) && (rate != 44100)) {
 		goto stcre_err1;
 	}
+
 	if (ms < 40) {
 		ms = 40;
 	}
@@ -97,7 +104,7 @@ UINT soundmng_create(UINT rate, UINT ms)
 //	keydispr_delayinit((UINT8)((ms * 10 + 563) / 564));
 
 	samples = (rate * ms) / 2000;
-	samples = (samples + 3) & (~3);
+	samples = (samples + SOUNDBUFFERALIGN - 1) & (~(SOUNDBUFFERALIGN - 1));
 	dsstreambytes = samples * 2 * sizeof(SINT16);
 	soundmng_setreverse(FALSE);
 
@@ -129,9 +136,11 @@ UINT soundmng_create(UINT rate, UINT ms)
 	vermouth_module = midimod_create(rate);
 	midimod_loadall(vermouth_module);
 #endif
+
 #if defined(MT32SOUND_DLL)
 	mt32sound_setrate(rate);
 #endif
+
 	dsstreamevent = (UINT8)-1;
 	return(samples);