Yamaha FVX-1 FM 8 op synthesizer module

via this auction, via dlmorley in the forum. "very rare programmable 8-operator FM synthesizer expander released in 1988 - 64 editable parameters - 22 direct + 42 with DOS based editor - DSP - 11 effect algorithms Stereo-Chorus, Stereo-Pan, Symphonic, Phaser, Flanger, Delay, Tremolo, Digital hall, Celeste and Wah. - 5 LED dsplays + levelmeter - 4 x 8 voice blocks (4 part multitimbral) - 248 ROM, 248 RAM presets, 16 performances - 2x MIDI IN (front and back), 2x MIDI OUT (front and back), MIDI THRU, Headphone OUT, Aux OUT Stereo, Main OUT Stereo, Main In Stereo Cinch, Main Out Stereo Cinch, Aux In Stereo Cinch, Aux Out Stereo Cinch, Pack Port - 14 Buttons + 1 Coarse, 4 endless controllers, 1 Main Out volume knob, 1 Aux Out volume knob, 1 headphone Out volume knob One of, if not THE best FM synth module. 8 operator FM. 4 separate synths each with 8 note polyphony I believe."