[LAU] I really need help with jack

[Paul Davis]

are you really 100% sure that audacity is routing via JACK? you're running
JACK on your *second* audio interface (the USB one)


On Sun, Jan 27, 2013 at 12:26 PM, Bob van der Poel <bob at mellowood.ca> wrote:

> Hey, I have some success to report !!!!
>
>
> > I record regularly (and play back) using JACKD, Audacity and a UCA202.
> I'm
> > using Debian Sid WITHOUT PULSEAUDIO or an RT kernel.
> >
> > I use QJackCTL to start JACK with these settings:
> > Server prefix: "/usr/bin/jackd -S --realtime
> > Realtime box: checked
> > Priority: DEFAULT
> > Frames/period: 1024
> > Sample Rate: 48000
> > Periods/buffer: 3
> > Dither: None
> > Audio: Duplex
> > Input device: hw:1
> > Output device: hw:1
> > Channels I/O: 2 (for both)
> > Latency I/O: Default (for both)
>
> Okay, this is a start. I tried it and it sort of works. Problem is
> that on playback I get motorboat sound. Not what we want. I also get a
> bunch of dbus errors while jack is trying to start.
>
> So, decided to give it one last try :)
>
> I have pulse running, etc. From a command line:
>
> pasuspender -- jackd -d alsa -d hw:1
>
> jackdmp 1.9.8
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2011 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> JACK server starting in realtime mode with priority 10
> Cannot lock down 82241434 byte memory area (Cannot allocate memory)
> control device hw:1
> control device hw:1
> audio_reservation_init
> Acquire audio card Audio1
> creating alsa driver ... hw:1|hw:1|1024|2|48000|0|0|nomon|swmeter|-|32bit
> control device hw:1
> configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
> ALSA: final selected sample format for capture: 16bit little-endian
> ALSA: use 2 periods for capture
> ALSA: final selected sample format for playback: 16bit little-endian
> ALSA: use 2 periods for playback
>
> Start up audacity ... and it works! Using audacity setting Overdub On
> I get the background playing out of the usb headphone jack. And
> recording seems to be fine. Just spoke some <this is a test> stuff
> into the mic, but that seems to work. I'll try my sax later.
>
> I have no idea why the qjackctl is barfing. Versions?
>
> > Settings in Audacity:
> > Set your project rate to 48000Hz.
>
> Does this make a difference? I have jack running now at 48000 and
> audacity at 44100 and it sounds fine.
>
> So, some progress on a cold winter's day. Wonderful.
>
> --
> **** Listen to my CD at http://www.mellowood.ca/music/cedars ****
> Bob van der Poel ** Wynndel, British Columbia, CANADA **
> EMAIL: bob at mellowood.ca
> WWW:   http://www.mellowood.ca
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20130127/4f34c786/attachment.html>