Syntovox 216
Model:         Syntovox SPX 216
Bands:         14
Retail price  1500 Euro
Produced:   ???
Size:             1 HE
Features:     Stereo out , all CV’s available on rear connector, VCO,  selection carrier source, formant shift.We included many new features like stereo output and a variable high pass filter for speech input.
Suited for live as well as studio use.This is our last model which was produced.Used parts: 
CEM3360
LM324
TL074
TDA 1034/NE5534
CD 4052
CA3080

Left button, carrier select:
Carrier input (LEDs off)
Speech distortion
Internal VCO, sawtooth wave
Internal VCO, PWM wave
Middle button, formant shift:Up formant (analizer 123… -> synthesizer 234…)
Normal formant (analizer 123… -> synthesizer 123…)
Down formant (analizer 234… -> synthesizer 123…)
External patching through rear connector, no internal connections (LED’s off)
Right button, output:Bypass
Vocoder
Vocoder + bypass
The VCO is not 1V/octave, but it makes it easier to get started or to do a demo.Stereo was achieved by mixing odd synthesis channels to left and even to right.