Paia 2720 A 2700 series Modular Synthesizer with 7 Modules

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"This Paia-2720 keyboard synthesizer is quite an interesting vintage synth. The 2700 series patchable capability makes it more flexible than many other synths from the seventies. You can use this as a stand alone synth for spacey sound effects, experiments and groovy (though simple) analogue sounds or use its modules together with your other patchable gear to get some more power and variety! You can even use it as an effects processor and route external sounds through it. It's got its own unique sound no other synth manufacturer has captured. Here are its features (modules appear in bold):

Power Supply module
includes 2 adjustable voltage sources with outputs and multiples

voltage control oscillator (VCO)
ramp, triangle and pulse outs, with adjustable
pulse width and 3 CV ins

FUNCTION GENERATOR (envelope generator)
expand on off (lengthens attack time)
manual trigger button
trigger input (for keyboard or other gate)
attack knob
decay knob
5v p-p envelope CV out
variable out with associated attentuator

LOW PASS FILTER (LP VCF)
1 audio in
1 audio out
3 CV ins

BANDPASS FILTER (BP VCF)
1 audio in
1 audio out
"q" (resonance) knob
3 CV ins

CONTROL OSCILLATOR (LFO = low frequency oscillator)
Tuning switch 1-3Hz, 3-9, 9-25 Hz
Tuning knob
5v p-p voltage out
variable voltage out
noise source audio out

VOLTAGE CONTROL AMPLIFIER (VCA)
0db audio in
3db audio in
1 audio output
3 voltage control ins

3 octave keyboard
glide amount knob
pitch (transpose) knob
2 trigger outs
1 control voltage out"