Carlos Olmos used a MacroPad and a Pi 3B to make a music player which they could use to listen to albums from their own collection and shared the project on Hackster.io
The MacroPad RP2040 controls the playback of the music collection by sending commands to a small service in the Raspberry Pi. The rotary encoder controls the selection of the album. The keypad has the usual playback controls: play, pause, stop, etc.
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