Re: Intel Azalia problems (some progress)

[Takashi Iwai <tiwai@suse.de>]

At Fri, 15 Apr 2005 15:15:15 -0700,
Josh Green wrote:
> 
> On Fri, 2005-04-15 at 14:41 +0200, Takashi Iwai wrote:
> > > Still clicking in output, seemingly even with 48KHz audio, still
> > > investigating.  Also many programs lock up at the end of the audio
> > > output (like Rhythmbox when a song is finished for instance).
> > 
> > This is an unknown problem, so far.
> > We got a similar problem but it was solved by setting TCREG bits 0-2.
> > Possibly a similar mis-configuration by broken BIOS.
> > 
> 
> An additional note about the clicking.  It seems that some programs work
> fine and others don't.  XMMS using OSS API will play 48KHz or 44KHz
> files without clicks, while sox play command will click with 44KHz but
> works fine with 48KHz.
> 
> I think the difference may be that XMMS mmaps the device while sox does
> not, here is some strace output from the two programs:

Or, it may depend on the period/buffer size.
Could you try alsa-lib CVS version, BTW?


> aplay on the other hand is fine with 48KHz wav files, but 44KHz mono
> files click badly (and lock up aplay at the end, requiring a kill -9),
> 44KHz STEREO on the other hand works fine.  Strange..

Hmm, HDA codecs (at least ALSA drivers) don't support mono, so it must
be converted in alsa-lib thus identical with stereo...


Takashi


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