Ubuntu Studio & Qsampler

holotone at gmail.com holotone at gmail.com
Mon Nov 19 02:27:09 GMT 2007


Another related bit - The soundcard itself (UCA200) appears to have a
sampling rate of 32/44.1/48kHz and 24-bit resolution - Does this mean
qjackctl needs to be configured differently?

~h

On 11/18/07, holotone at gmail.com <holotone at gmail.com> wrote:
>
> Also of relevance: I'm using the Behringer UCA200 USB audio interface as a
> sound card.
>
> ~h
>
> On 11/18/07, holotone at gmail.com <holotone at gmail.com> wrote:
> >
> > Wowzer.. So, quite the output from that command you gave me - Very..
> > err.. verbose :)
> >
> > You can find it here:
> >
> > http://pastebin.com/m345b2ad3
> >
> > And here's the output qjackctl's Messages gives me when I try to run as
> > realtime:
> >
> > http://pastebin.com/m62e0c812
> >
> > Thanks a ton, Chris!
> >
> > On a related topic, can anyone point me toward a good guide to
> > understanding and configuring qjackctl? I'd like to know what sort of
> > latency is realistic, and how to achieve it.
> >
> > Thanks!
> >
> > ~holotone
> >
> > On 11/12/07, Chris Dawson < xrdawson at gmail.com> wrote:
> > >
> > > strace is "system call trace."  It simply runs a program within a
> > > harness that outputs all the system calls made.  In this case, it will
> > > output and tell you where the jackd program is dying.  In my case I
> > > saw that it was dying when it tried to open and write to the
> > > directory.
> > >
> > > It is absolutely harmless to run strace, it just outputs a lot of
> > > extra information you probably won't understand, but would be useful.
> > > If you'd like run it and send me the output.  You can do this:
> > >
> > > strace -ooutput.txt /usr/bin/jackd -R -u -dalsa -dhw:0 -r44100 -p1024
> > > -n2 &
> > >
> > > Then, it'll either die on its own, or you'll need to run:
> > >
> > > killall -9 strace jackd
> > >
> > > ...to kill it.  Then, send me the output.txt file and I can look for
> > > something suspicious.  Or, you can check it out youself and perhaps
> > > you can figure it out.
> > >
> > > Chris
> > >
> >


-- 
~cole
http://holotone.net/
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