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Rhizome

Rhizome editor

A rhizome is a root that spreads sideways by subdividing. This one grows on the tuning: a played note sends out runners - further voices standing Interval scale degrees above the root, read from the patch's tuning rather than from the harmonic series.

That is what makes it different from Substrate and Mineral. Their intervals are numbers (a fifth is always 1.5), so they sound the same in any tuning. Rhizome's intervals are degrees, so the scale is not just what it is played in - it is what it is made of. Retune the patch and the timbre moves, not only the pitch.

Parameters

WaveThe runner's waveform: sine, saw or square.
RunnersHow many shoots grow from the root (1 = just the root).
DegreesThe gap between consecutive runners, in scale degrees.
CreepSlow independent pitch drift per runner, in cents. Roots never grow straight, and it stops the stack phase-locking.
TiltThe level slope along the chain. Low keeps the growth close to the root; high lets the far runners sing.
BloomHow long a note takes to open.
DecayHow long it takes to die away after release.
CutoffA lowpass over the sum - a tall stack of saws is a lot.
LevelOutput level.

Six voices, MIDI-driven (PianoRoll, DNA, or the QWERTY keyboard when this editor is focused). Runners alternate left and right for width.

Try: Degrees 1, Runners 6, Creep 0, sine - a cluster of adjacent degrees that beats at the scale's own step size. In 12-TET it is a semitone pile; in 19-EDO it is something else entirely. This is the setting that makes a tuning audible as a texture rather than as a tuning.