Please feel free to contribute your setups, apps and experiences for others here in this thread.
From our users we have had information about these apps which might be useful depending on the audio setup you have.
(We have no affiliation with these companies.)


Video conferencing software include:
Zoom
Microsoft Teams
Skype
Google Hangouts
Apple FaceTime


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General information about setting up:
Some random links (which may get broken at some later date but you can search otherwise):

https://tonara.com/blog/how-to-build...essons-studio/
https://teachanywhere.stanford.edu/r...-setup-options
http://www.robbyburns.com/blog/rly3a...47egdg6miwafqh



Audio Routing (Mac)
Apple: Combine audio interfaces (Aggregate device):
https://support.apple.com/en-us/HT202000

Apple: Play audio though multiple audio devices at once
https://support.apple.com/guide/audi...s7c093f372/mac

Various:
https://rogueamoeba.com/loopback/
https://rogueamoeba.com/soundsource/

Ginger Audio GroundControl (Virtual Audio Driver)
https://www.gingeraudio.com


Switching devices, buttons, controllers for multiple audio or video inputs:
StreamDeck
https://www.elgato.com/en
You can create your own icons and map key commands for the various buttons for your specific needs.
For example, dedicate a button for muting your microphone, or switching cameras, or microphones, or specifying which screen to broadcast

ICON audio
Various products related to live streaming, devices with buttons to control streaming, recording surfaces
https://iconproaudio.com

https://iconproaudio.com/product/liv...c1-microphone/