The Syrinx is a monophonic analog synth. It has no Midi and no presets.  The Syrinx is actually Syrinx 2, the first syrinx Syrinx 716  (1973) never came out.

The first serie has a black painted bend pad and it was presented at the Firato fair (amsterdam) in red, white, (blank alu) blue and orange. The later models has a blue bend pad. The colours were blue, red, black and grey with white text.

Syrinx . blue version

Syrinx capabilities

Audio sources: 2 VCO’s, Divider, PRM, noise. (External audio in on last series)
Modulation sources: 2 ADSR’s, 2 LFO’s, modulation pad, CV in, keyboard (not on last series)

Syrinx Schematics,   Syrinx Manual txt only,

Syrinx manual dutch

Some youtube movies 

Thomas P Heckmann

Syrinx Brochure

Spare parts

The syrinx is based at curtis ic’s

VCO-CEM3340, VCF-CEM3350, VCA-CEM3360, EGR-CEM3310,
OPAMPS  TL074 (or 4741), LM324 CA3140 and CA3080
CMOS IC  4001, 4013
Rotation switch Lorlin (fi CK1514 , CK1061 )
Potmeters  and faders Radiohm.  Potmeters: the Weltron WEP160KC(S)-12-50F1 is mayby a replacement for the radiohm potmeters.  See   page spareparts, some parts are availlable












We have sold syrinx with an EH instant replay.  The syrinx was modified for using the with the instant replay.  You can play the instant replay with the syrinx and the output of the instant replay is processed by the syrinx.  Instant Replay

There a arelso modified syrinx with extra CV inputs for the filter frequency and the ADSR parameters, Audio input for the filter,  CV input for controlling the modulation from the ADSR to the filter and VCA, CV input for the touchpad.

Syrinx patchsheet

Filters: Three VCF’s.
The three filters can be switched in various ways. This makes the Syrinx very flexible

A final series of six Syrinxes was made after Synton went out of business. 
These were mounted in flight cases, and had no keyboard


Due to the large number of controls, it is not always easy to reproduce a sound you’ve made earlier.The Syrinx uses seven Curtis chips for VCO’s, VCA, RM, VCF’s and envelopes.