--- uae/src/sd-uss/sound.c	2018/04/24 16:59:09	1.1.1.4
+++ uae/src/sd-uss/sound.c	2018/04/24 17:04:34	1.1.1.5
@@ -127,7 +127,7 @@ int init_sound (void)
 	return 0;
     }
 
-    scaled_sample_evtime = (unsigned long)maxhpos * maxvpos * vblank_hz * CYCLE_UNIT / rate;
+    scaled_sample_evtime = (unsigned long)MAXHPOS_PAL * MAXVPOS_PAL * VBLANK_HZ_PAL * CYCLE_UNIT / rate;
     scaled_sample_evtime_ok = 1;
 
     if (dspbits == 16) {