Raymond Scott's Wall of Sound, an electro-mechanical sequencer
designed & built by Raymond Scott, 1950s (New York)
EVERYTHING SYNTH
from left to right: Casio VZ-1, Teisco 60F, Korg ER-1, Yamaha DX200, Casio CZ-3000, Elektron Machinedrum Userwave, Elektron Sidstation, Nord Modular, Roland TR-707, Korg MS-2000, Yamaha CS-15, Roland SH-09. Not in pic: Future Retro 777, DSI Evolver.