• Registered: 2021-09-16
  • Posts: 2

Topic: Is there a Limitation of Outputs in ClassCompliant mode?

Hello everyone,

I'm new to Linux and try to get 12 output channels of a Fireface 802 running.

I run the Fireface in ClassCompliant mode and it is connected via USB to the computer with Ubuntu Studio 20.04 LTS as operating system. Basically the Fireface works, I can use 8 output channels for my sound playback via Jack.
But the problem is that I actually want to get playback from 12 loudspeakers in our loudspeaker circuit. When I start Jack, it displays 22 output channels, but as I said, only 8 playback channels are playing sound.

Is there a limitation of the output channels in ClassCompliant mode?

About any suggestion for a solution I would be very happy!!!

  • waedi
  • DAW Mastermind
  • Offline
  • From: Swiss Zürich
  • Registered: 2020-12-08
  • Posts: 4,522

Re: Is there a Limitation of Outputs in ClassCompliant mode?

In the settings of Jack is the selected driver ALSA ?
Are there any others to choose ? Tested ?

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue
  • Registered: 2021-09-16
  • Posts: 2

Re: Is there a Limitation of Outputs in ClassCompliant mode?

Yes I have selected ALSA as driver respectively the snd_usb_audio driver is used.
I can select other pulseaudio, coreaudio, firewire etc. but I have not tested any except ALSA.