If you’ve got an old Hi-Fi or sound system with an AUX input, this project is for you. Try balenaSound, a starter project to quickly and easily add Bluetooth to an old Hi-Fi, speakers, or any other audio device using only a Raspberry Pi. Source: balena.io
Audio engineering
Small, powerful audiophile earbuds with an in-ear microphone that excludes ambient noise. Users can exclude ambient noise and clearly be heard or understood, even in the nosiest environments. + RippleBuds