Re: [ecasound] delay problems

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Subject: Re: [ecasound] delay problems
From: S. Massy (theanaloguekid@tak.net.dhis.org)
Date: Fri Dec 15 2000 - 22:06:12 EET

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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