alsa was Re: [PD] problems with Pd and edirol usb

pix pix at
Thu Jan 2 21:50:37 CET 2003

i have the emi2|6 usb sound device which i have been having troubles with
under pd. i have a few different problems, but the one related to this
email is that when i use the alsa driver i get pops and clicks also, even
when using the test patch.

this is kind of frustrating because the multi-channel output under oss
doesn't seem to work (i think i'll send a fresh message about this). multi
channel works with alsa, but with the aforementioned pops.

pops happen even when just using two channels,

whereas i can play dvds with 5.1 sound etc using the alsa plugin in xine
with no problems.


On Mon, 28 Oct 2002 17:04:39 +0000
Nick Fells <nick at> wrote:

> Hi,
> Anyone had experince with the edirol usb UA-1A interface + pd?
> I've tried running under winXp, and Linux (Debian sid, latest alsa
> driver, kernel 2.4.19). In both, I get random clicks (even just using
> the test patch) - the same phenomenon under both systems (!).
> I bought an ASIO driver for Win, from Now works fine
> mostly, but in my own patch, it clicks horrendously. This is a patch
> using my own gran-samp object, but it works smoothly using the crappy
> on-board Cirrus chip...!! (just v.v. poor sound).
> Any thoughts, pointers?
> Cheers,
> Nick
> -- 
> Dr Nick Fells,	
> Music Department,
> University of Glasgow,		Tel: +44 (0) 141-330 4096
> Glasgow G12 8QQ			Fax: +44 (0) 141-330 3518
> UK.
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