Akemie's Castle

A 38 HP dual VCO with authentic 4 operator FM on an original Yamaha YMF262 (OPL3) chip: four operators, each with its waveform (8), frequency multiplier (1 to 15) and level (0 to 63), combined by one of six algorithms across the two oscillators; a feedback for each; oscillator A's chord mode, up to five voices, with voltage controlled inversion.

Key features

• Osc A and Osc B, each with a coarse and a fine frequency knob and a V/Oct input; outputs A and B
• Four operators: Wave, Multiplier and Level, with CV inputs, attenuators and attenuverters
• Six algorithms stepped by the Operator Algorithm button, each shown by its lamp
• Feedback (Osc B's Fb input normalled to it), Chord (16 chords, up to five voices) and Inv inputs