GUIDE TO ASSEMBLY OF ERICA SYNTHS POLIVOKS-INSPIRED EG
If you are reading this, most probably, you are about to build Erica
Synths DIY Polivoks-inspired Envelope generator. This module is
30mm deep, skiff friendly, has solid mechanical construction and
doesn’t require wiring. The core of the Envelope Generator is
borrowed from famous Russian synth Polivoks , but we significantly
updated schematics:
1) the original Polivoks has negative gate, therefore we made the
EG work form eurorack standard positive gates,
2) we adjusted envelope amplitude for eurorack modular
requirements,
3) we introduced inverted envelope output,
4) we updated looping feature (looping on gate on),
5) most importantly, we added Gate Delay feature – the module
outputs delayed gate signal after Attack stage. Chain up several (4-
5) Envelope Generators, each with delayed gate to create evolving
polyphonic synth-like pads!
The DIY Envelope kit comes in three versions:
1) PCB,
2) PCB + panel,
3) Full kit.
FEATURES:
•
Full ADSR envelope
•
Direct and inverted envelope outputs
•
Gated and independent looping modes
•
Gate delay (after Attack stage) output
•
Skiff-friendly design
SPECIFICATIONS:
•
Envelope amplitude
0…10V
•
Attack time
0…3”
•
Decay time
0…12”
•
Sustain level
0…10V
•
Release time
0…12”
•
Panel width
8HP
•
Module depth
30mm
•
Power consumption
20mA@+12V, 10mA@-12V
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Adjust Attack time from 0 to 3”!
Adjust Decay time from 0 to 12”!
Adjust Sustain level from 0 to 10V!
Adjust Release time from 0 to 12”!
Select between normal ADSR and looping AR
mode! If patch cable is patched in Gate jack,
looping will occur only if the Gate signal is
present.
This is Gate Delay output. High Gate signal
appears here after the Attack stage.
This is Gate input.
This is inverted envelope output.
9
This is main envelope output.
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