diff --git a/src/custom.cpp b/src/custom.cpp
index 9c37a2c7..ec187bf2 100644
--- a/src/custom.cpp
+++ b/src/custom.cpp
@@ -40,6 +40,8 @@
 
 #define nocustom() (picasso_on)
 
+extern int screen_is_picasso;
+
 static uae_u16 last_custom_value1;
 
 /* Events */
@@ -2209,6 +2211,9 @@ void compute_vsynctime (void)
 {
   if (currprefs.chipset_refreshrate) {
   	vblank_hz = currprefs.chipset_refreshrate;
+  }
+  if (screen_is_picasso) {
+	beamcon0 = new_beamcon0 = currprefs.ntscmode ? 0x00 : 0x20;
   }
 	vsynctimebase = syncbase / vblank_hz;
   if (currprefs.produce_sound > 1)
diff --git a/src/sd-sdl/sound_sdl_new.cpp b/src/sd-sdl/sound_sdl_new.cpp
index a728bfe0..36b82f59 100644
--- a/src/sd-sdl/sound_sdl_new.cpp
+++ b/src/sd-sdl/sound_sdl_new.cpp
@@ -48,6 +48,10 @@ bool cdaudio_active = false;
 static int cdwrcnt = 0;
 static int cdrdcnt = 0;
 
+
+extern int screen_is_picasso;
+
+
 #ifdef NO_SOUND
 
 void finish_sound_buffer (void) {  }
@@ -94,8 +98,14 @@ void update_sound (int freq, int lof)
   	freq = lastfreq;
   lastfreq = freq;
 
-	if (lof < 0) {
-		lines += 0.5;
+  if (currprefs.ntscmode || screen_is_picasso) {
+        hpos += 0.5;
+        lines += 0.5;
+  } else {
+    if (lof < 0)
+          lines += 0.5;
+    else if(lof > 0)
+          lines += 1.0;
   }
 
   evtime = hpos * lines * freq * CYCLE_UNIT / (float)currprefs.sound_freq;