static uint8_t vsync; /* 0 (Disabled), 1 (Enabled), 2 (Dynamic) */
 
 /* sound stuff */
-#define SOUND_BLOCK_COUNT    8
+#define SOUND_BLOCK_COUNT    6
 #define SOUND_BUFFER_SIZE    (2*54000/50*SOUND_BLOCK_COUNT) // max.rate/min.frames
 
 static short __attribute__((aligned(4))) sndBuffer[SOUND_BUFFER_SIZE];
        l = PicoIn.sndOut - sndBuffer;
        if (l > sizeof(sndBuffer)/2)
                lprintf("ovfl %d %d\n", len, PicoIn.sndOut - sndBuffer);
-       if (l > samples_block * 6) {
+       if (l > samples_block * (SOUND_BLOCK_COUNT-2)) {
                sndBuffer_endptr = PicoIn.sndOut;
                PicoIn.sndOut = sndBuffer;
        }
        samples_made += len / 2;
 //     lprintf("signal, %i/%i\n", samples_done, samples_made);
        ret = SignalSema(sound_sem);
-//     if (ret < 0) lprintf("snd signal ret %08x\n", ret);
+       if (ret < 0) lprintf("snd signal ret %08x\n", ret);
 }
 
 static int sound_thread(void *argp)
 {
+       lprintf("sthr: start\n");
        while (!sound_thread_exit)
        {
                int ret = 0;
                }
 //             lprintf("sthr: got data: %i\n", samples_made - samples_done);
                short *sndOut = PicoIn.sndOut, *sndEnd = sndBuffer_endptr;
-               int buflen = samples_block * 2;
+               int buflen = sndEnd - snd_playptr;
                if (sndOut >= snd_playptr)
                        buflen = sndOut - snd_playptr;
-               else    buflen = sndEnd - snd_playptr;
                if (buflen > samples_block)
                        buflen = samples_block;
                ret = audsrv_play_audio((char *)snd_playptr, buflen*2);
-//             if (ret != buflen*2 && ret >= 0) lprintf("sthr: play ret: %i, buflen: %i\n", ret, buflen*2);
+               if (ret != buflen*2 && ret >= 0) lprintf("sthr: play ret: %i, buflen: %i\n", ret, buflen*2);
                if (ret < 0) lprintf("sthr: play: ret %08x; pos %i/%i\n", ret, samples_done, samples_made);
 
                samples_done += buflen;
 void pemu_sound_stop(void)
 {
        samples_made = samples_done = 0;
-       plat_sleep_ms(100);
+       plat_sleep_ms(200);
        audsrv_stop_audio();
 }
 
 
                g_screens[i]->Width = 328;
                g_screens[i]->Height = 256;
-               g_screens[i]->PSM = GS_PSM_CT16;
-               g_screens[i]->Filter = GS_FILTER_LINEAR;
 
                g_screens[i]->Clut = g_screen_palette;
                g_screens[i]->ClutPSM = GS_PSM_CT16;