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

[Nicolas Pomarède]

Le 13/02/2011 22:57, David Savinkoff a écrit :
> Hi,
>
> Referring to dmaSnd.c:
>
> void DmaSnd_Reset(bool bCold)
> {
> 	nDmaSoundControl = 0;
>
> 	if (bCold)
> 	{
> 		dma.soundMode = 3;
> 		microwire.masterVolume = 7;
> 		microwire.leftVolume = 655;
> 		microwire.rightVolume = 655;
> 		microwire.mixing = 0;
> 		microwire.bass = 6;
> 		microwire.treble = 6;
> 	}
>
> 	/* Initialise microwire LMC1992 IIR filter parameters */
> 	DmaSnd_Init_Bass_and_Treble_Tables();
>
> 	microwire.mwTransferSteps = 0;
> }
>
> DmaSnd_Init_Bass_and_Treble_Tables(); may need to be called
> (for resetting purposes) in a more fundamental place instead of
> DmaSnd_Reset(bool bCold);
>
> This would explain wacky initialization at less than 22050KHz.
>
> David

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