At Tue, 18 May 2004 17:03:17 +0100, James Courtier-Dutton wrote: > > 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 ?
if i understand the above correctly, audigy can assign 4 mono streams as a stereo (interleaved?) 32bit stream. it's similar as emu10k1 uses 2 mono streams for a single stereo 16-bit interleaved stream. in the case of 16-bit stereo, CPF_STEREO_MASK is used to toggle this mode. so, there must be a similar register switch for 32-bit mode. otherwise it can't work... Takashi ------------------------------------------------------- This SF.Net email is sponsored by: SourceForge.net Broadband Sign-up now for SourceForge Broadband and get the fastest 6.0/768 connection for only $19.95/mo for the first 3 months! http://ads.osdn.com/?ad_id=2562&alloc_id=6184&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
