--- uae/src/sd-sgi/sound.c	2018/04/24 16:58:58	1.1.1.2
+++ uae/src/sd-sgi/sound.c	2018/04/24 17:04:24	1.1.1.3
@@ -113,7 +113,7 @@ 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;
 
 	sndbufpt = sndbuffer;