[PlanetCCRMA] m-audio quattro again

Juan I Reyes juanig@ccrma.Stanford.EDU
Tue May 22 15:08:02 2007

Hello Hakan and Oded

Just spent last weekend working with the Quattro on a multi-channel
setup. Works on FC4 ~> FC6 with Fedora stock kernels and PlanetCCRMA rt
kernels. Yes, you need to specify the number of playback channels on
Qjackctl. Therefore try to use Qjackctl because it makes things a bit

I got better results with kernels newer than 2.6.16. Seems that there
are some bugs on uhci_hcd and ohci_hcd modules on 2.6.16. Also try not
to have a USB mouse at the same time because the driver doesn't like the
combination (bandwidth issues of course). I would imagine, it doesn't
like USB sticks and USB drives either. Furthermore stop jack (with
Qjacktl ) while doing processor intensive jobs like compiling and
copying files.

For hours I was able to work without system hangs using 16Bit 44.1 KHz
audio signals (knock on wood!). 

  --* Juan

> .asoundrc needs to be in your home directory. Now on Qjackctl on:
> setup/settings/interface/  you need to manually write q4 because it
> doesn't appear in the drop-down list. Jack should start and I don't
> think you need to specify the number of output channels which defaults
> to zero.
> I have tried the Quattro with FC-6 stock kernels and it also
> works. /etc/rc.d/init.d/alsasound is not available in FC-6 stock
> kernels.