moin Robert,
On 2007-05-30 17:15:06, "Atwood, Robert C" r.atwood@imperial.ac.uk appears to have written:
-----Original Message----- On Behalf Of Bryan Jurish
...
run pd with the "-rt" switch (which required getting realtime capabilities patches working: urgh) when using ALSA directly, otherwise I get audio pops and eventual "tried but could not sync" errors. fyi, I run pd here with:
moocow@binky:~$ cat
which pd-ua25.sh#!/bin/sh ( pd -rt -r 48000 -alsa -channels 2 -audiodev 6 "$@" & ) ( sleep 5 ; aconnect-usb2pd.perl; jack-chrt.sh )I don't quite follow: are you using JACK or the ALSA connection from pd? Or you mean jack-chrt is badly named because it's not actually doing anythign wth JACK?
I meant that the script is badly named because it doesn't do anything with jack (well, to be totally honest, it might tweak jack's priorities if it finds a jackd running, but I'm not usually running it these days).
I've tried using jack, even gotten things working, but my experiences to date with pd audio over jack have been less than fantastic, so I haven't put too much effort into it (contrast with the desktop, where I need/want to run ardour, but that's a different animal altogether). As I recall, the tests I ran with jack and the ua-25 all worked pretty well, but jack likes to complain when you use the alsa plugin layer "plughw:2,0" or whatever. I also used to get subtle but audible pops every 30 sec or so using jack, and I never figured out why... maybe it's gone now ;-)
I was about to get a UA 25 so am quite interested in how this works. With the builtin (intel HDA) I get pops when using JACK but not when I use the ALSA output . I did not get the pops with a different application, when using JACK, but just when using PD and JACK .. Though I've not exhaustively tested all applciations yet. But, I really want to get the sound stream from PD into another application and via JACK seems like the simplest way.
... attached is a relevant message I just received off-list which looks as if it was intended for this thread ...
marmosets, Bryan
On 2007-05-30 21:45:44, Olivier Heinry oli4444@googlemail.com appears to have written:
Hi,
here is my running set up for the UA 25 on debian lenny/sid, no kernel patch (2.6.18), Alsa compiled via the module-assistant:
interface in advance mode @48k
qjackctl runs with the following: server : jackd, driver alsa Realtime, soft mode & force 16bit mode ticked priority 89, frames/period 256, rate 48k, periods/buffer=3 dither none audio : playback only latency=16ms
pd started as follow:
pd -r 48000 -rt -jack -audiodev 1 (or whatever your setup, 0 being the intel chipset #)
Midi managed through qjackctl, just fine!
++ O.