Hi, At Thu, 6 Dec 2001 21:40:09 +0100 (CET), Karl Ranseier wrote: > > Hi Takashi, > > On Thu, 6 Dec 2001, Takashi Iwai wrote: > > > > I would like to get 24 bit output working with > > > a C-Media PCI CMI8738 (model 37) and alsa-driver-0.9beta10. > > > > > > Are there any userland-tools to send a 24 bit pcm file to the > card? > > > > It should be possible, but not supported on ALSA driver yet. > OK. > > > So, more generaly speaking, how do I send a 24 bit PCM file to 'any' > 24 > bit sound card. Any tools, demos, examples, etc? Depending on application. Generally, set the format in hw_params correctly during pcm set up phase.
> How do I get the capabilies of a sound card. (I checked /proc/asound/ > but > haven't found anything thats says "I can play 16bit, 8bit, > ulaw,....") Hmm, AFIAK no proc file provides this info. You need to check source code.. Well, it's not difficult to show such info, though. > > There is a register bit which seems to toggle this, but as far as > I've > > tested it didn't work, thus disabled so far. > > Please check card-cmipci.c. > > Ahh, I see, you mean CM_SPD24SEL, I guess. > So, how do I enable it? There are no comments in the source that 24 > bit > output is disabled. And there is no information from vendor about this bit ;) You can only guess.. > In snd_cmipci_playback_spdif_prepare() it looks like that CM_SPD24SEL > is allready used!? Yes. AC3 data requires this. Please feel free to hack the driver :) Takashi _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
