The Analog Polyphon is a new take on the traditional music box. Hand-cranked like the first mechanical music boxes, it’s a human-powered analog synthesizer. The turning of the crank generates power for the synth and also feeds a piano roll through the music box, so it’s a fully self-contained electronic synth with no batteries or plugs. Notes are played when wire spring contacts meet the copper tray, and each note pipes to a single speaker, creating a complex multi-channel sound. The speakers are in individual cases, so they can be arranged in any layout.