[PlanetCCRMA] pd, alsa, fc3, SB audigy

David O'Toole dto@irrationalgames.com
Thu Mar 10 07:06:01 2005


I experienced this exact same problem with an Audigy 2 ZS Platinum
Pro, Pentium 4, FC2 + ccrma edge kernels running Pure Data.

It would run fine for a few minutes, then the storm of glitches would
come until the outgoing signal was trashed (but file on HDD sounds
fine when played back later, no glitches.) Then after some silence,
the signal suddenly comes back, and maybe 15 minutes later the whole
noisy process starts again.

But apps like xmms and Snd play for hours and hours without trouble on
that machine. It seemed to persist across different edge kernels.

I never was able to figure out what's wrong with it, and since I have
upgraded to a newer rackmount PC with a Delta 1010, I have not tried Pd
with the Audigy much.

Michael Gurevich <gurevich@ccrma.Stanford.EDU> writes:

> yo yo yo,
> First time caller, fresh off the farm without Nando to fix everything for 
> me :-( So instead of bugging him privately, I might as well distribute the 
> whining. Sorry if this has been asked before, couldn't find it in the 
> archives.
> Anyway - brand new FC3 and planetccrma install on a dell P4, with a SB 
> Audigy 2ZS. Using kernel 2.6.10-2.1.ll.rhfc3.ccrmasmp.
> When I run pd -alsa and run a test tone I get periodic I/O errors that 
> result in dropouts. The dropouts get steadily closer together until all I 
> hear is a nice steady stream of glitches. Everything seems to work fine 
> with Jack. Any thoughts, (other than the obvious "don't use -alsa, use 
> -jack").
> cheers.
> -- 
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Dave O'Toole