If you’re not a hacker type, you can just get the following hardware:
https://pt.aliexpress.com/item/Controle-De-Volume-USB-Altofalante-Do-Computador-Controlador-de-Volume-De-udio-Cabo-Ajustador-Uma-Tecla/32845548050.html
If you are the hacker type, you can use the following:
-ATTiny dev board: https://www.ebay.com/p/Digispark-Kickstarter-Attiny85-Arduino-General-Micro-USB-Development-Board/1873410506?iid=113322552360
-EC11 5 pin rotary switch encoder
-Use the following Arduino script: rotaryKnobHID.ino in this github repo: https://github.com/thomashollier/max2play_knob
The github repo has the python scripts as well but it is all in progress so use at your own risk.
