On Fri, Apr 11, 2008 at 12:17:05AM +0200, Zbigniew Baniewski wrote:
quoted text
> I would to ask about the issue to be found under Linux - is it valid for
> OpenBSD's "audio" too?
> 
> http://www.diyaudio.com/forums/showthread.php?threadid=93315
> 
> "The latest versions of ALSA which are included with Ubuntu Edgy, and I
> think Dapper Drake as well, will resample all audio to 48kHz if your
> soundcard does not support hardware mixing. This is also true if the driver
> doesn't support hardware mixing. As far as I can tell, there is absolutely
> no support for hardware mixing with any of the Envy24 chips in Linux. The
> problem with this resampling is that by default ALSA uses a poor resampling
> algorithm to save CPU usage, and destroys the quality of everything played
> back. ALSA uses this software mixing and resampling in order to let more
> than one application play audio at the same time. I have found a solution to
> the audio quality issue however. [..]"

the sample rate shouldn't be a problem; on OpenBSD all usual sample
rates between 8kHz and 96kHz (multiples of 8kHz and 11.25kHz)
should work.

the "unusual" format used by envy (and other "pro" cards) is a
problem for most apps though

-- Alexandre