Subject: Re: [ecasound] delay problems
From: Jeremy Hall (jhall@uu.net)
Date: Fri Dec 15 2000 - 23:08:18 EET
I set debugging to full. Replacing the audiopci with the sblive took care
of the delays I was seeing. There is a small delay with the sblive, but
it is tolerable.
_J
In the new year, S. Massy wrote:
> On Thu, 14 Dec 2000, Jeremy Hall wrote:
> >
> > I get the following errors in capture only:
> >
> > Dec 14 00:37:35 Pongo kernel: ALSA pcm_lib.c:110: Unexpected hw_pointer
> > value (delta: -8): wrong interrupt acknowledge?
> >
> > I am trying to find out whether these are noisemakers or real problems. No
> > matter what buffer size I use, I get a few of these.
> >
> > If I try alsa or oss-linux_current, I still see delays in fdx
> > operations. The smaller the fragment size, the faster these errors are
> > generated with alsa-cvs.
> >
> > By the time I get to the fourth concurrent track, the delay is extremely
> > noticable, on the order of 30 or 40 miliseconds. No matter how small I
> > make the buffersize, the problems still show up. I'm so frustrated with
> Delays between what and what? Do you mean in real time, reading/processing/writing back to /dev/dsp? If so it sounds a lot like a problem I had and still have with an SBLive except that I've never seen such errors as you mention. How much debugging have you set upon compiling alsa?
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