Master Your Modular Rhythms! // SIGMA from Vostok Instruments

video upload by DivKid

"Sigma from Vostok Instruments takes clocks, triggers, gates, even audio (good destructive fun) and turns them into gates you can control and modulate the length of. Sounds simple, but the ability to control gate length, add NOT outputs as gate delays and the logic section which takes Sigma to a whopping 23 outputs is fantastic!"

"Sigma is a multi-channel gate processor with a strong focus on rhythm and time-event manipulation.

The module generates up to 23 simultaneous gate signals directly related to the four gate inputs, allowing you to fire an entire array of synced events in your patch by just moving pots and connecting cables.

The core of the module is composed of four identical CV-controlled gate-length processors that create exact copies of your gate signals with adjustable length.

The Logic section creates new events from each length-processed pair using analog Boolean circuits.

Pair Sigma with a trigger sequencer or clock generator, and a bunch of drum modules or voices to get a vast amount of new rhythmical patterns on the fly.

- Four CV-controlled Gate Length Processors.

- Fully adjustable Length from 1ms to infinite.

- Dedicated NOT Output per channel.

- Dedicated Logic section adding 15 extra gate outputs with AND, NAND, OR, NOR and XOR operations for each pair of channels.

- Hybrid design combining a digital length processor with fully analog logic circuits to ensure minimal latency."


VIDEO *TIMING INDEX // CHAPTERS*

00:00 Hello & previews

01:33 What are we doing, what’s Sigma?

02:07 Feature run down

PATCHES

03:12 Basic flams, gate delays, rhythmic timing, groove & feel

07:20 The importance of flams and off grid beats
bonus DAW beat making example

08:53 Flams that can time travel for better beats in Eurorack

12:11 Flams & gate delays for melodic excitement

14:26 Creative pre delay to add to reverb

17:25 Time quantised gate delays - shift register style

20:24 Time quantised gate delays - shift register style - melodic addition

21:03 Humanised rhythms

24:33 Intense PWM and noisy audio pulse streams

26:24 Crazy broken sounding distortion

28:15 Add CV controlled hold stages to envelopes

31:12 From AD to DAHD envelopes

34:37 Infinite hold mode - a whole bonus sustain pedal for your envelopes

37:08 Playing with Logic - care free exploration

40:41 A call & response bass rhythm generator - I didn't expect this one!

45:18 Jose (almost) fixed my logic problem!!

49:32 Roll your own burst generator