Melody Workbench

Each voice = one CEM3394 synth chip. F1 selects chip. All notes are VCO frequency (real pitch). Toggle voices to find the melody.

Speed 120% Tick 3.0ms

CEM3394 voices (click to solo, checkbox to toggle):

Z80 sound CPU drives 6 CEM3394 synth chips via 12-bit DAC. F1=channel select (1:1 chip mapping). All pitch bytes → VCO register 0.