MATRIXSYNTH: Five Thoughts For Eurorack Modular

Friday, March 02, 2018

Five Thoughts For Eurorack Modular

Published on Mar 2, 2018 John L Rice

"While this isn't a demo of the ADDAC214 VC Rotator, all five of these pieces use it in the patch. See patch details below:

Unless otherwise noted the following terms indicate:
ADDAC214 - ADDAC System ADDAC214 VC Rotator sequential switch
VCO - Synth Tech E330 Multimode VCO
EG - Modcan Quad Envelope
VCA - Bubble Sound VCA4p
Voice - VCO+EG+VCA
Mixer - Circuit Abbey Unify + expander
Sequencer - Division6 Mattson SQ816
Clock - Erica Synths Black VC Clock v2
LFO - Erica Synths Black Octasource
E102 - Synth Tech E102 Quad Temporal Shifter
QPQ - Instruo Quad Performance Quantizer
Delay - Mooer Ocean Machine pedal
Reverb - Mooer Ocean Machine and TC Electronic T2 pedals

1) Initial Test 0:00
A typical 4 voice patch I do with this system is to process a CV sequence through the E102 shift register and then through the QPQ to provide CV and gates for the Voices. In this case the ADDAC214 is inserted between the E102 and QPQ so that when clocked at a faster rate the QPQ gets channel updates more often and fires the Voices more often. I'm using a modified Doepfer A-182-1 Switched Multiple + Doepfer A-180-2 Multiple to switch between the different Clock outputs. Delay used was the Synth Tech E580 Resampling Mini Delay.

2) LAIR 2:45
This "wiggled drone" is basically 4 VCOs cross modulating each other. Audio Out 1 of all four VCOs are sent to the Mixer and audio OUT 2 of all four VCOs are sent to the ADDAC214 inputs. The ADDAC214 outputs are sent back to the VCOs FM inputs but offset by one, so most of the time a VCO will be modulating the adjacent VCO but as the ADDAC214 rotates the outputs a VCO will be occasionally modulating itself. A Synth Tech E355 Morphing Dual LFO is used to modulate the ADDAC214 rotation and to also modulate the Octasource LFO waveform.

3) Little Dog Sez 9:47
This is a single Voice patch with the addition of a Synth Tech E440 VCF. The Sequencer output for row 1 is sent through a Doepfer A-185-2 Precision Adder then through a 2hp Tune quantizer and then to the E102. The four E102 outputs are sent to the ADDAC214 inputs but unlike the patch in the first piece "1) Initial Test" only output one is taken from the ADDAC214 and sent to a Ladik C102 Dial Lag (not used in this piece) and then to the 1v/octave input of the VCO, so, more of a traditional sequential switch usage of the ADDAC214, but, two of the other ADDAC214 outputs are sent to the modulation inputs of the VCO and the fourth is sent to the 1v/octave input of the E440 VCF. The E440 VCF is also getting additional modulation from the LFO and EG.

4) Sky Sea 11:17
This is an extended exploration of the same patch from the previous video "3) Little Dog Sez" but with slightly different settings and manipulated differently, in particular the Clock setting was left static, the range knob on the Sequencer was used instead of the Doepfer A-185-2 Precision Adder to shift the range of notes and the Ladik C102 Dial Lag was incorporated a bit.

5) Brown Studio 18:10
In this patch the a Synth Tech E950 Circuit Bent VCO + E951 Looping Expander are being manipulated and modulated. Four outputs of the LFO are sent to the ADDAC214 inputs and ADDAC214 output 1 is sent to the E950 FM/Index input. The ADDAC214 rotation is being both stepped by the Clock and also CV'd from another output of the LFO. A sixth output of the LFO modulates the E951 Bank. A second Clock output is patched to the E950 Sync input and a third Clock output is patched to the Rebel Technology Stoicheia euclidean trigger sequencer. The two Stoicheia outputs are patched to the E951 Short and Long inputs. The female vocal is played from a Mellotron Micro keyboard and processed through Montreal Assembly Count To Five delay and TC Electronic Hall Of Fame reverb pedals.

Notes: this eurorack modular case is my own DIY creation power supply - two 4ms Company Row Power 40 final output mixer - Mackie 402-VLZ3 camcorder - Canon C100 MkI lenses - Xeen 24mm and Xeen 14mm recorder - Atomos Ninja Blade using Avid DNxHD edited on a Windows 8.1 64 bit PC using Sony Vegas Pro 13 random overlaid video clips are licensed through

These are all John L Rice 'realtime improvised test performances' and unedited except for post productions EQing, color correction, and special effects etc. so what you see and hear is what happened, for better or worse. ;-)

Thanks for watching, rating, and commenting, all very much appreciated! :-)"

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