Walk 4

Description

Walk 4 is a Brownian random walk generator with lots of CVable parameters to play with. With Trend CV, you can turn it into a sawtooth generator or, at audio rates, a sawtooth VCO. With added randomness from the random walk!

A ‘battery for CV’, an analogue accumulator is a circuit which stores a voltage, and then charges or discharges it in discrete steps according to a trigger signal. Walk 4 combines four such accumulators with a clock generator, four white noise sources and an auto reset system to create a 10 HP voltage stepping juggernaut.

The accumulators are principally used to create staircase waveforms. At each trigger, the stored voltage changes by a certain amount. This value can be set directly through an input, by the module’s shared parameters trend, volatility and constrain, or any combination thereof.

Trend provides a fixed value input to all accumulators, while constrain prevents them from straying too far away from the baseline. Volatility brings the noise generators into play, adding an element of chance at every trigger. This elevates Walk 4 from not just a quad arpeggiator or subharmonics generator, but also a fourfold random walk CV or coloured noise source.

With full voltage control and independent value and trigger inputs for each accumulator, there’s always more stochastic patching to explore ahead. And if you need a reliable master clock source with a huge range, 1 volt per octave tracking and external reset—that’s covered, too.

Like a sample-and-hold with a master’s degree, Walk 4 brings a welcome touch of vintage analogue computing to any Eurorack system.