Introduction
Congratulations on your purchase of an Expert Sleepers “Persephone”. Please read this user
manual before operating your new module.
Persephone is a VCA (Voltage Controlled Amplifer) using a discrete JFET as the gain element.
The JFET can be tastefully (or violently) overdriven for saturation/distortion efects.
Persephone also includes a zero-crossing detector, which can be used to restrict gain changes to
zeros in the audio waveform, preventing clicks and pops that can occur with very fast
envelopes, especially on lower pitched sounds. In fact, with the zero-crossing circuit engaged,
you can use a simple gate as the CV input without clicks.
The module's signal and CV paths are 100% analogue (there is a little discrete logic involved in
the zero-cross circuitry).
Installation
House the module in a Eurorack case of your choosing. The power connector is 16-pin
. If using the power cable supplied with the module, the red edge of the cable is closest
to the bottom edge of the PCB, and carries -12V. ("-12V" is marked on the PCB itself next to this
end of the connector.) Be sure to connect the other end of the power cable correctly, again so
-12V corresponds to the red stripe on the cable.
Power requirements
Persephone draws up to 33mA on the
+
12V rail, and 26mA on the -12V rail.
It does not use the 5V rail.
1 http://www.doepfer.de/a100_man/a100t_e.htm
