[PlanetCCRMA] Ardour 0.9beta7 segfaults

Sampo Savolainen v2@iki.fi
Tue Oct 28 11:09:01 2003

It has been a bit of a struggle to get the Quattro working. I probably
should try writing some sort of a guide.

1. The usb controller you plug the Quattro in should use IRQ9.

2. Don't let the OSS usb-audio driver to load.
   If you use hotplug, put usb-midi & audio in the hotplug blacklist.

3. jackstart -R -t 1000 -d alsa -d quattro1 -r 48000 -p 256 -n 4 -H -M
   (I use qjackctl, but this is what my configuration boils down to.)

One problem I have with the Quattro, is that sometimes tha alsa drivers
don't initialize the quattro properly. When that happens, all input, and
sometimes output has a huge digital gain (+150db or something?).

For this problem I created a script which plays a wav file with aplay,
then records a file with arecord and analyses the recorded soundfile. If
the soundfile is too loud (=gain problem), the script restarts the
snd-usb-audio driver and starts from the top.

Also, a tip for midi: midi doesn't work if there is equipment plugged in
when you load the driver.

(btw. I'm not using the newest ccrma kernel, I'm using

 Hope this helps.

On Tue, 2003-10-28 at 20:40, Josh Steiner wrote:
> hey sampo, can i ask you if you had to do anythign special to get your 
> quattro working with rh9/ccrma? a  few months ago i tried to get mine 
> working but there seemed to be an alsa bug preventing me... i thought 
> i'd wait a bit until i tried again... if you are having good luck with 
> it perhaps my wait is over :)
> so, did you just plug it in and it worked? 
> thanks!
> -josh
> Sampo Savolainen wrote:
> >I keep getting segmentation faults with the new Ardour version. They
> >didn't happen in the earlier version. I can't say exactly what causes
> >the segfault, but I kept having them when I was recording a short solo
> >on a single stereo track. Anyone else having segfault problems with the
> >new Ardour?
> >
> >I'm using RH9+ccrma packages P4 + M-Audio Quattro.
> >
> >
> > Sampo
> >
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> >  
> >