[hatari-devel] STE sound breakage with lower sound frequencies

[Nicolas Pomarède]

Le 13/02/2011 23:16, Nicolas Pomarède a écrit :

> Yes, I was thinking about that too, it would explain why we can start
> Hatari at 44.1 and switch to 16 kHz and still have sound (but if we
> start directly at 16 kHz, we don't have sound) ; something is not
> correctly initialized.
>
> Nicolas

Eero,

looking at the code in change.c, I see that when audio freq is changed 
this doesn't call Audio_SetOutputAudioFreq, but only Audio_Init (with 
Audio_Uninit being called just before).

This explains why we get STE sound when starting at 44.1 kHz and going 
to 16 kHz : DmaSnd_Init_Bass_and_Treble_Tables is not called, so we keep 
a working 44.1 kHz IIR table.
If we start at 16 kHz, we create a 16 kHz IIR table and never change it 
if we go to 44.1 kHz later.

Could you modify change.c to also call Audio_SetOutputAudioFreq ? (as it 
is already the case when using --sound)

Thanks

Nicolas