Flux is a stew of analog noises, a random trigger generator, and a random CV source

Flux is a stew of analog noises, a random trigger generator, and a random CV source. The core of the module is a hand-picked transistor that gets reverse biased to generate white noise. This gets processed in a variety of ways for different spectral and CV content.

The S (slow) output is the sub-audible energy from the white noise and it produces constantly twitching and turbulent CV. Use the S output to breath a sense of change into almost any patch. The -1(S) output is an inverted version of the S output.

The offset control adds a voltage offset to the slow outputs in the range of +/-8V. A bipolar LED keeps track of the polarity and strength of S. The offset CV input can be used to inject CV signals into the flux and “sass” them up. Try running an envelope or LFO into the offset CV input and using the fluxed up version out of the S or -1(S) output.

The grain output is white noise through a comparator. The comparator senses the white noise and waits for it to cross a certain threshold (set by the grain control or CV input), then goes high when it does. The density of the crossings range from seconds apart to audio rate. Therefore this output can be used as a random trigger generator or as an audible harsh noise source.

The fltr’d output is red noise – white noise low pass filtered at a 6db/octave rate.

Notes: Plugging into the grain CV will usually disrupt the current grain threshold (it will jump to a new value) – this is normal. Also, the relationship between CV and grain amount is inverse – more voltage equals a less dense grain output.

There is still some amount of audible noise that passes through to the S outputs. Additional low or band pass filtering may be needed to modulate VCAs directly with no noise added. A cool patch is flux >> bpf >> vca, then crank up the bpf resonance and sweep the cutoff. In general, you can filter the S outputs to get different “speeds” of random modulation (demonstrated in the first soundclip below). There’s no harm in tweaking with the blue trimpot on the back of the module – it sets the overall gain of all outputs (minimum grain count, S liveliness). You’ll receive it with white noise calibrated to about 10Vpp.


13MA @ +12V
13MA @ -12V


  • 13 mA +12V
  • 13 mA -12V
  • 0 mA 5V
  • 21 mm deep
  • Ø 5.00 (1 Votes) Average Rating

This Module is discontinued.

$60 Price in € submitted Mar 24th 2017, 20:42 by schemawound | last Change Sep 3rd 2017, 14:47 by Knutt

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