Saturday, April 15, 2017

3 Modules #1: Maths, STO, Rings

Published on Apr 15, 2017 Comparative Irrelevance

"My current eurorack setup looks like this:

Disregarding the 1U row, there are 10 separate modules. This means that there are a total of 120 different three-module combinations possible with my setup. In this video series I intend to explore each and every one of those combinations.

To start it all off: Here’s a drone piece featuring Maths, STO and Rings. I’m using a feedback loop through Rings, which is in «sympathetic strings» mode, over a low drone from the STO. And, of course, Maths provides some complex modulations of the sounds.

Patch illustration:

In principle, each patch will consist of only the three modules in the given combination. HOWEVER, the 1U row is «fair game». Some combinations may necessitate mixing, attenuation or an input clock signal, and this is why I won’t count the bottom row of utilities as separate modules. I’ll be happy to take requests as to which combinations to try out next."

3 Modules #2: uScale, Brain Seed, Branches

Published on Apr 17, 2017

"This is probably the silliest three module combination I can put together: none of these modules produce any kind of signal on their own, and even with external input they're not really meant to produce sound.

Patch notes:
Patch #1:
Noise tools generates an audio rate pulse wave, which feeds into Branches. Branches produces two signals from this input: a pulse wave at an octave below the input (ch. 1) and a sporadic series of triggers (ch. 2).

The pulse wave is then fed into the slew limter, as a basic low pass filter to smooth it out a little. It then passes to the uScale V/oct, which functions as a kind of bit crusher (disabling steps leads to a lower "bit depth"). The output from uScale is the audio signal we hear.

The triggers from Branches are used to step through a sequence of random values on the Brain Seed. These values are then sent to the uScale shift input, which causes the audio signal to sputter and jump around to different pitches and tones.

Patch #2:
I actually made this one first, but it felt a bit "cheaty" because of the heavy use of the shimmer reverb and filtering via the noise tools slew limiter, and also the uScale didn't really contribute much. Anyways, here's what's up:

Once again, the noise tools provides an audio rate pulse wave. Branches and Brain Seed are used to divide the signal into different sub-harmonics, and uScale is used to bitcrush one of the waves.

These three drones are mixed together in the Quadratt, which is what I'm tweaking most of the time, and then the sum is sent through the slew limiter/LPF on its way out to the Big Sky reverb."

3 Modules #3: Rings, Peaks, Brain Seed

Published on Apr 17, 2017

"Wanted to go with a simple and pretty one to follow up the messy episode 2. This is one of my favourite patches.

Patch notes:
Peaks ch. 2 produces a simple, skewed ramp wave LFO which feeds into the Brain Seed seed input. Brain Seed treats this kind of like a sample and hold signal input, and samples the ramp wave to produce V/oct CV for Rings.

However, unlike a regular sample and hold module, Brain Seed doesn't react to a trigger signal. Instead it stores the 8 most recently sampled values, and moves between them as directed by the Cycle CV input. In this case, I'm using a smoothed random LFO from Peaks ch. 1 to modulate this movement. Since it's a random signal, the sampled values are output in random order. But since it's smoothed, it "strums" through adjacent values to get from one point of the sequence to another.

By switching on and off "ReSeed" on the Brain Seed, I can choose to lock down the 8 sampled values (ReSeed off - cycle LED flashes green) which leads to somewhat repeating patterns, or allow new values to be sampled (ReSeed on - cycle flashes red). I'm using this to create movements and repetitions as I see fit."

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