Cosmotronic PERADAM 00005 User manual

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#00005
PERADAM
10 HP
REVERSE POLARITY
PROTECTED
+12V: 56mA
-12V: 45mA
OVERVIEW
Peradam is an analog distortion module in 10HP with an internal sidechain,
like a compressors twisted brother. The input signal is split up, the main
signal goes into a VCA, while the sidechain is phase modulated, before being
fully ring modulated, to create a signal at twice the frequency of the
original. This signal then modulates the amplitude of the VCA, creating
complex self distortions in the main signal.
That output then goes into a dual band drive circuit, similar to the one
found in Cosmix, before entering a soft clipper output stage. Things get
really wild when you start feedbacking this output back into the input,
creating very rich feedback tones.
The module even goes into self oscillation at high feedback levels,
producing all sorts of crazy sounds. Modulating all these parameters gives a
broad palette of distortions, from subtle saturation to massive clipping and
complete destruction.
Need a bit more drive? There's a handy +6dB gain switch on the input
for that. A blend slider allows you to further dial in your tones, and mix in
the distortion to taste.
SIDE-CHAINED DISTORTION
ADRIVE
BPHASE
CHARMONICS
DFEEDBACK AMOUNT
ELOW FREQUENCY DRIVE
FHIGH FREQUENCY DRIVE
GBLEND (WET/DRY)
HGAIN BOOST SWITCH
IFEEDBACK CV ATTENUATOR
JDRIVE CV ATTENUATOR
KAUDIO INPUT
LFEEDBACK CV IN
MPHASE CV IN
NHARMONICS CV IN
ODRIVE CV IN
PSIDE-CHAIN INJECT CV IN
QOUTPUT
A
B C
D E F G
H
I J
K L P O Q
NM

PERADAM
The main distortion character is achieved using a side-chain that modulates
the original signal, not by over overdriving the amplitude.
When you turn up the DRIVE knob Ayou increase the amount of this
modulation. With the knob all the way counter clockwise (CCW) the signal is
undistorted.
The PHASE knob Bcontrols the phase of the side-chain. Please be aware that
the DRIVE needs to be open for PHASE to have an effect.
This side-chain is the multiplied by itself, resulting in a doubling of the
frequency. This is done using a multiplier, a device that takes two analog
signals and produces an output which is their product. In synthesis this is often
known as a ring modulator.
This output is used to modulate
the amplitude of the original signal.
Changing the phase offset of the
side-chain has a big impact here,
because of the way the signals line
up drastically changes the shape
ouf the waveform.
IN PHASE
PHASE DIFFERENCE
90° DIFFERENCE 180° DIFFERENCE
SIDE-CHAIN MULTIPLIER
INPUT (100 Hz) OUTPUT (200 Hz)
Output waveforms with phase at 90 and 180 degrees
The INJECT CV input Pcan be used to send control voltages or audio into the
side-chain. This input is summed together with the internal side-chain, before
being multiplied (ring modulated). This is dependent on the DRIVE setting.

PERADAM
The HARMONICS knob Cadds a DC offset to the input signal, which results in
asymmetrical clipping, changing the harmonic character of the sound.
Using the HARMONICS CV input N, you can mix in other sound sources or
control voltages as well. Can also be used to mix in an additional feedback
path.
The LOW Eand HIGH Fsliders are a dual band over-drive, inspired by the BBE
sonic maximizer. These can be used to boost the harmonics generated by the
previous stage.
The FEEDBACK Dslider controls a VCA for internal feedback, that can also be
CV controlled. Higher settings will result in self oscillation, with some careful
sweet spots allowing for a kind of ‘pinging’ of the distortion.
This works great in combination with the LOW/HIGH overdrive.
There is some additional circuitry that automatically compensates the gain,
as well as a final soft clipping circuit. If you want to boost the input a bit, you
can use the the small gain switch Hto add 6dB.
The BLEND Gslider is a simple WET/DRY control. The dry signal is only affect-
ed by the +6dB gain switch.
SIGNAL PATH

POWER
MAKE SURE THE POWER IS OFF WHEN INSTALLING ANEW MODULE
IN YOUR SYSTEM, AND PAY CLOSE ATTENTION TO THE ORIENTATION
OF THE POWER CABLE.
PLEASE NOTE THE LABEL “RED”AND WHITE LINE, UNDER THE
POWER HEADER ON THE BACK OF THE MODULE. MATCH IT WITH
THE RED LINE OF THE RIBBON POWER CABLE. THE RED LINE
INDICATES THE -12VPOWER RAIL.
COSMOTRONIC MODULES ARE REVERSE POLARITY PROTECTED, BUT
WILL NOT TURN ON IF THE CABLE IS REVERSED.
LIMITED WARRANTY
COSMOTRONIC WARRANTS THIS PRODUCT TO BE FREE FROM
DEFECTS IN WORKMANSHIP AND MATERIALS FOR APERIOD OF ONE
YEAR FOR THE ORIGINAL INVOICE DATE. THE WARRANTY COVERS
REPLACEMENT OR REPAIR.
FINAL DISCRETION OF WARRANTY COVERAGE LIES SOLELY
WITH COSMOTRONIC.
CONCEPT AND DEVELOPMENT: MATTHIJS MUNNIK
CONTACT: [e-mail]
2021