Kit Overview # 39 - Roman Sowa´s Pierdzidelko

Published on May 1, 2019 Synth Diy Guy

"A demo of Roman Sowa´s cool new noise maker kit, the Pierdzidelko!
Build video coming soon!"

via Sowa

"DIY kit is what kids today love the most, so here it is, first kit from MIDI-hardware!
It's rather complex build consisting of roughly 150 parts, so prepare for 2 hours of soldering. And hopefully you will enjoy playing it just as much as assembling it. This is four-oscillator cross-modulation drone sound generator, that can also play nice and polite sounds, even controled via external Hz/V signal. But that's not why it was made for. There are 4 identical VCOs, each producing 3 waveforms that can be separately mixed to audio output and to modulation matrix. Each VCO can frequency modulate all other 3 VCOs, so you can expect wild and crazy sounds coming out of it."

This is how it looks like assembled

Tangerine Dream Modular Synthesizer

Published on Jan 24, 2018 Todd Murray

Based on circuit designs from Ray Wilson, Thomas Henry, Michael Barton, YuSynth, Saint Gillis, Roman Sowa & SixBySeven.ca

"A small tour of the DIY Modular showing the various modules and where they are relatively located. This is used as a demonstration for the main article. Please visit http://sixbyseven.ca/the-tangerine-dr...
for all the details on this synthesizer and others.

This modular synthesizer has:

5 – VCOs, trackable over 7 octaves
1 – LFO
6 – VCAs
3 – VCFs
3 – Envelope Generators
1 – Ring Modulator
1 – Delayed Modulation
1 – Phase Shifter Module
1 – Wave Modification (Freaker)
1 – Sample & Hold Module
1 – Noise Module
1 – Wah Module
4 Channel Mixer, with effects routing
1 – Voltage Controlled Echo Module
2 – MIDI to CV programmable converters
1- CV & Gate Signal Expansion Module
1- Voltage Quantizer Module
1- Multi-Function Expanded Arpeggiator
2 – Variable DC power supplies."

MFoS modular

via Skrog Productions on electro-music.com where you will find follow up comments and images including the Dual ADSR further below.

"Largely MFoS with Elby, CGS, Yuvsynth, Roman Sowa, BugBrand circuits. All modules up & running bar Quantizers & Gate to Trig. converters. I've populated all boards with waterwash solder for shiney long lasting component connections (hopefully Very Happy ).

It's been the simplest faults that catch me out all the time building during debugs but i'm looking forward to starting the bare ASM2 board .................. when time permits."

Roman Sowa's simple AD633 RingMod

flickr by fonik2000

full size

www.sowa.synth.net/modular/rm.html