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Pics of the inside below.

This Formant was precisely made in the Switzerland approximately in 1985-88. An appearance and working condition are very good, the synthesizer was serviced, adjusted, new interconnection between modules was made, electrolytic capacitors on the PSU are replaced.
Other accessories: Original documentation with schematics, patch cords, CV and GATE 6.3” conectors on the rear panel. Standard 230V power input. Weight 20kg, 54x61.5x27 (cm)
Modules overview:
4x VCO
waveforms: sawtooth, trianle, sinus, pulse, spaced sawtooth, all waves can be mixed freely together
1V/oct. characteristics, switch for internal/external CV
FM input with gain control
PWM input with gain control
PW control
coarse, fine tune controls
output gain + conector
1x 24dB VCF

ext. Signal conector with gain control
output signal conector with gain cotrol
cutoff, resonance, ADSR controls
LP/HP switch
6,12,18,24 dB switch
Serial / parallel switch
VCO1/VCO2 switch
1V/oct. characteristics, switch for internal/external CV
1x 12dB VCF

ext. Signal conector with gain control
output signal conector with gain cotrol
cutoff, resonance, ADSR controls
LP, HP, BP switches, combinations are possible
Serial / parallel switch
VCO3/VCO4 switch
1V/oct. characteristics, switch for internal/external CV
2x Dual VCA
AM input and gain control
Ext. Signal and gain control
Gain control
ADSR on/off switch
4x ADSR
attack, decay, sustain, release controls
envelope conector
AD/ADSR mode switch
1x triple LFO
3x freq controls
3x output conectors tringle, sawtooth, pulse
1x Noise modul
low/fast random voltage control
outputs: white nose, coloured noise, random voltage
1x COM modul (Common Output Module)
equalizer bass, midle, treble
output gain control
2x 6.3mm jack audio outputs
LED +15V/+5V/-15V"




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