What I'm listening to today: "Speciation", Passepartout Duo
An old technique in ambient music is "phasing", where you play two loops of different lengths and let them go in and out of sync, creating different interesting patterns. It's a truism this requires electronics or tape, because two humans trying to play out-of-sync tempos would confuse each other. These two seem to be actually doing a live phase performance, dueling xylophone and gameboy-style squarewave loops