Programmatically change your system's mic and speakers with NirCmd and Elgato StreamDeck - Scott Hanselman's Blog
Stream Deck} 'Switch Audio Device' and other functions not working : r/ElgatoGaming
Using a Stream Deck for productivity - a software developers solution - James Ridgway
Elgato Stream Deck MK.2 White – Studio-Controller, 15 Makrotasten, Auslösen Von Aktion In Apps Und Software Wie OBS, Twitch, Youtube Und Anderen, Für Mac Und PC: Amazon.de: Musikinstrumente & DJ-Equipment
Elgato on Twitter: "3) Soundboard output: On Windows you can now designate a specific audio output for each soundboard action. https://t.co/9WWWxvpVbI" / Twitter
Stream Deck Integration - Cantabile - Software for Performing Musicians