How to map 2 channels from a 32-channel USB device to L/R?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


This has been driving me crazy for a few weeks!  I do volunteer work around Town, and a local church got its hands on a really nice Allen-Heath QU-24 sound board.  It has a USB-B jack. I recently set up a Video camera with control computer for streaming services and events. The new sound board was to vastly improve the audio quality.

When I connect it to the church's "streaming" computer, running Ubuntu 20.04 it is recognized as both a SOURCE and SINK device. In Audacity, I can select any of the 32-channels and see they are working.  We have our streaming mix (9) on CH17 and CH18, repeated on CH1 and CH2 for testing.  Again, Audacity has no problem selecting any of them.

They stream using Zoom, Zoom lists the QU-24 but when selected no audio.  We use OBS Studio 27.2.4 for the video (virtual camera), it also lists the QU-24 but no audio.

I figured out half of my solution by creating a virtual sink monitor that Zoom can use as a microphone:

# include the pulseaudio config file
.include /etc/pulse/

# null sink
load-module module-null-sink sink_name=Source

# virtual source
load-module module-virtual-source source_name=VirtualMic master=Source.monitor

Which I learned from this post:

Which I tested with an analog mic into OBS that came out the Zoom meeting.

So, if OBS is not going to pickup the QU audio for me, is there a PACTL command I can use to path CH1/CH2 to my virtual sink?  Or, even better, CH17/CH18?

Thank you in advance!

[Index of Archives]     [Linux Audio Users]     [AMD Graphics]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux