Playing around with the Synthi-E's envelope shaper.
It's an unusual beast.
We are all used to a 4 stage ADSR style of envelope.
EMS however used the Trapezoidal Envelope.
This also has 4 stages. They are Attack, ON, Decay, Off.
The Synthi AKS uses knobs to adjust the 4 stages, and can be set to
"manual" or "free run" triggering.
The Synthi E is much simplier.
Attack & decay are set using the rise & fall sliders.
On /off are determined by the gate length.
Connecting a gate to the second black input form the bottom (bipolar "?") will make it behave as if it were an LFO.
The envelope starts on both the rise & fall of the gate ... I think this is the equivalent "free run mode".
The gate itself is interesting ... it's a short to ground.
Touching a cable with your bare fingers will produce the required gate.
This is essentially an S-trig.
Manufacturers like (vintage) Korg & Moog use S-trigs.
BTW, I don't recommend plugging anything into your synthi which is not from EMS.
The filter, is in self oscillation mode.
About the patch:
I'm using a square wave to trigger the EG.... which is opening /closing the VCA.
The filter is in self oscillation mode.
If you still want to trigger the Synthi' gate with eurorack, you will probably need a V-trig to S-trig converter. I haven't tested this myself. These synthi's are rare and expensive so be careful if you plan to try this.
Analogue Solutions used to produce a Eurorack version of the Trapezoidal Generator.
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