Love the idea of open source but for that price I can get earbuds with Bluetooth and typec dongle connection capable as well allowing more low lantancy high bandwidth stuff like gaming or playing an instrument. Hopefully they make some then I'll buy.
Open Source Bluetooth headphones, apparently with fantastic sound and ANC for a mere 70$.
I just ordered them. #foss for life
https://pine64.com/product/pinebuds-pro-open-firmware-capable-anc-wireless-earbuds/
Discussion
I need those mostly for retarded gym music and audiobooks, I got god tier Sennheiser headphones for my desktop. They'll do fine.
Search for Ploopy Headphones, maybe those are of interest to you