Ubuntu 22.04 Default Audio Source and Sink Setting

Support and Help
1

Ubuntu Version:

22.04.5 LTS

Desktop Environment (if applicable):

GNOME Fallback

Problem Description:

I am an Amateur Radio Operator. I use some digital communications programs (wsjt-x, js8call and fldigi w/flrig) for some of my communications. Part of the interface to my shortwave transceiver is a SignaLink USB. This uses a TI 2904 Codec to provide an audio interface to the programs, both source and sink. My system also has a normal audio board using a Creative Labs CT5880. This is for audio and system notifications. The issue that I have is that I need the CT5880 to be the default audio at all times but the system often switches to the 2904 Codec due to some background criteria. I need to lock the CT5880 as default because the switch can cause me to send unauthorized transmission over the airwaves such as music or audio from videos. I do not want a letter or visit from the FCC.

Relevant System Information:

Screenshots or Error Messages:

What I’ve Tried:

I have to go into the sound controls and select the default audio input and output.
2

in pulseaudio there is pactl list sinks and pactl list sources and could be set or set default.

pactl list <tab>

in pipewire there is wireplumber and .local/state/wireplumber and some help is more advanced to common user earth issues…