Re: [hatari-devel] DSP bug found (and maybe solved)

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wt., 16 kwi 2024, 18:35 użytkownik Nicolas Pomarède napisał:
Le 16/04/2024 à 01:12, Eero Tamminen a écrit :

> Btw. of the things not yet checked for release, "L'Abbaye Des Morts"
> remains.
>
> Its current (v2.3 based) info states:
>
> "Needs FPU. Slower than it should, because Hatari doesn't support Videl
> 60Hz Falcon emulation yet, only 50Hz. DMA sounds effects are too low
> volume compared to YM"
>
> I don't have real HW i.e. no comparison point on the speed or volumes...

audio level difference between DMA and YM is a known issue, at least on
STE. It should be measured on real HW someday (I have this on my todo
list) and hopefully it will be the same on TT.

As for Falcon, maybe DMA and YM have yet another sound level difference,
as this is a different HW than STE/TT.

Nicolas

Hi,

YM path differs between Falcon and STE/TT.
Later one uses LMC mixer with fixed SDMA vs YM signal level. In case of Falcon, YM is connected through ADC converter with adjustable gain with hardware register: $ff8939


Regards 
Cyprian 


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