[PD-dev] // A/D/A sync errors with ALSA 1.0.10+ //

[Julian Oliver]

hi list,

i'm writing here and not to the users list as i suspect i might be onto some sort of bug.

on a Debian Etch, Debian Sid and an Ubuntu Dapper (Flight 6) system i am
getting repeating "tried but couldn't sync A/D/A" errors with 0.39.2-1 on an ALSA:

	$ dpkg -l | grep -i alsa
	ii  alsa-base                          1.0.11-1                       ALSA driver configuration files
	ii  alsa-oss                           1.0.11-1                       ALSA wrapper for OSS applications
	ii  alsa-tools                         1.0.11-1                       Console based ALSA utilities for specific ha
	ii  alsa-utils                         1.0.11-2                       ALSA utilities
	ii  alsamixergui                       0.9.0rc2-1-9                   graphical soundcard mixer for ALSA soundcard
	ii  libasound2                         1.0.11-3                       ALSA library
	ii  libasound2-dev                     1.0.11-3                       ALSA library development files
	ii  libesd-alsa0                       0.2.36-3                       Enlightened Sound Daemon (ALSA) - Shared lib
	ii  libpt-plugins-alsa                 1.10.0-1                       Portable Windows Library Audio Plugin for th
	ii  linux-sound-base                   1.0.11-1                       base package for ALSA and OSS sound systems

the Ubuntu system runs 1.0.10 as does the Debian Etch system, both of which have the same issue.

even with a:

	pd -alsa -rt

i have the same output, and when using jack i also get similar errors, though not as often. regardless pd under alsa is very choppy, rendering
it  unuseable.

i would assume something else was afoot, were it not for the fact that other ALSA and jack applications seem to run perfectly fine.
i'd also consider downgrading ALSA alogether but naturally this would mean downgrading numerous other ALSA applications upon which I'm pretty dependent.

Debian Sid has Kernel 2.6.16 and single sound device, Etch 2.6.12 a single sound device and Ubuntu 2.6.15 a single device also.
i've tried using 'pd -alsa -alsaadd <alsa devicename> -rt' to be sure. i've also tried a 'pd -alsa -inchannels 0 -outchannels 2 -rt' just in case on all three systems.

googling around i find only one other person with a similar issue, and that was from 2004:

	http://elists.resynthesize.com/pd-list/2004/10/

any leads greatly appreciated.

julian

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