Re: Card won't accept new sample rate?

[Takashi Iwai <tiwai@suse.de>]

At Tue, 29 Aug 2006 15:32:10 +0100,
Daniel James wrote:
> 
> Hi Takashi,
> 
> > OSS does software sample rate conversion as default.
> 
> Right, that figures.
> 
> > Check your /proc/asound/card0/codec97#0/ac97#0-0 file, whether it
> > contains "VRA" in Extended ID section.  If not, it's 48k-only codec.
> 
> Indeed it does not - thanks for the clue :-)
> 
> I have put an extra soundcard in one of the test machines showing the 
> problem. The new card has the ice1712 chipset, and this changes sample 
> rate perfectly.
> 
> Is there any change that has been made to ALSA recently, which would 
> mean that a 48k-only chipset no longer does sample rate conversion in 
> software by default? If not, could this be something broken in Debian's 
> configuration of ALSA?

If you start JACK, usually it prefers "hw" PCM, which means the direct
access to the hardware without resampling, up/downmix, and format
conversion (also without soft-mixing).  The "default" PCM is with
everything, i.e. dmix, and plug layer.

So, I guess this is intentional behavior.


Takashi

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642