Re: Audigy2 in SNDRV_PCM_FMTBIT_S32_LE mode.

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Takashi Iwai wrote:
> At Tue, 18 May 2004 16:47:01 +0100,
> James Courtier-Dutton wrote:
> 
>>What would I need to change in the emu10k1 driver, to get alsa-lib to 
>>send it 32bit audio samples.
>>I tried just adding the SNDRV_PCM_FMTBIT_S32_LE to the playback options, 
>>but that did not work.
>>
>>When I did that, everything just played at half speed.
>>
>>Can anyone give me any pointers as to where else I should change things 
>>in order to get 32bit audio to the Audigy2 DSP.
> 
> 
> AFAIK, emu10k1 engine processes only 16bit PCM.
> or do you know the register (or anything else) to handle 32bit data
> for audigy?
> 
> 
> Takashi
> 
> 

The SB Live DSP can only handle 16bit PCM.
The SB Audigy DSP can handle 24/32 bit PCM.

I am working from what someone has told me to get 24bit sound. Send it 
to the Audigy inside a 32bit value: -
For playback:
You can use voice grouping - alloc 4 FX busses for 1 stereo stream
or use TRAM.

Does this help you ?


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