via this Reverb listing
"One of less than 800 units made.FVS-1 informations:
Four dual-oscillator SEM modules each with its own filters and envelopes
49-note keyboard and polyphonic controller module allowing SEM modules to be assigned to keyboard in a variety of ways including fixed, split or continuous
Mixer/pan module
Polyphonic programmer module with 16 memory locations for either single or combination patches with each SEM programmable separately or in common
8 VCOs with sawtooth or variable pulse width waveforms; pulse width modulation from either envelop or LFO
4 classic resonant Oberheim VCFs with 12 db per octave cutoff slopes, each continuously selectable between low pass/notch/high pass configuration, and bandpass.
Separate envelopes for VCA and VCF with positive or negative routing of envelop to VFC; envelop routable VCO pitch or pulse width modulation
One triangle wave LFO per voice and one common global LFO from programmer module
Each of the polyphonic programmer and keyboard controller have there own manual global filter cutoff frequency control
°Modification:
individual audio outputs fitted for each SEM, these are the four extra ¼” jack sockets above the mixer module, very useful if you want to add EQ, effects or compression on each SEM independently, you can use both the separate outputs and the outputs from the mixer module together."
