Nanoloop on a Gameboy (whose audio is coming in on track 2) is synchronized to the drums playing in Ableton Live (track 1).
Says littlescale - “This is to test out a new interface I have been working on that syncs Nanoloop to a MIDI clock.”

An updated version of Nanoloop has been announced, version 1.3. Nanoloop is a cartridge for Game Boys that lets them be used for creating sequenced music.
Nanoloop 2.0 is available, but “some users miss the unique rough sound of the old Game Boy models and the simplicity of the old nanoloop versions.” To meet the interest [...]