Hi,
in a rather demanding setup I'm currently working on, I use two Pd instances: one for visuals with Gem, the other running with "-rt" for audio stuff. Both are connected through netsend/netreceive in UDP mode, all is happening on Linux.
I have to send quite a lot of data over this net connection (control data for audio generated from physical models and msd). Generally however this is no problem: If I run Pd using my laptop's internal soundcard all is fine. However I would like to use my USB soundcard instead, which is a Terratec Phase 26 with 2 channels in and 6 channels out.
Pd seems to be unable to handle this channel combination, so I started to use Jack. However now my troubles really begin: Somehow I'm not able to get this combination running stable. I run Jack realtime with -R and tried various values of -P to set jackd's priority: -P70 up to -P89. However with all of these, after some time the audio-Pd starts to run into a fight with the watchdog: signalling Pd to stop. The audio-Pd keeps running, however I get regular clicks in the audio stream. I *suspect* that this has something to do with the network data, like Pd is not keeping up with receiving the network stuff in time. Running the audio-Pd with "-noadc" helps a bit, but not for long.
So: Does anyone have any tips or tricks how to get a stable Pd in this situation? And should jackd run at a higher or at a lower priority than Pd?
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__