Arp

General information

Arp is a tempo-synced arpeggiator that turns held notes into a sequence. The pattern can run in 7 directions, span up to 6 octaves, swing on the off-beat, ratchet (1 to 4 sub-pulses per step), drop notes probabilistically, and follow a rhythm pattern generated by one of 6 algorithms (Euclidean, Fibonacci, Golomb, Aksak, Binary, Turing) plus a Manual mode.

The arpeggiator is always synced to the project clock — it does not free-run. The clock division (from 1/64 up to 1 bar) sets the step rate.

The Note FX has 4 tabs: PLAY (mode / hold / octave range / advance), SCALE (transpose / scale / root), TIMING (clock rate / gate length / swing / ratchet / probability) and RHYTHM (rhythm algorithm and pattern length).

PLAY tab

Mode	Hold	Oct.Range	Advance
Direction the arpeggiator walks through the held notes. 7 modes: Up, Down, Up/Down, Down/Up, As Played, Shuffle (random permutation cached per cycle), Random (per-step random note + octave).	Off: notes leave the held list when the gate falls. On: notes stay held after release; the arpeggio keeps running until you release Hold or replace the chord with a new one.	Number of octaves the pattern spans, from -3 to +3 (default 0 = single octave, no octave shifting).	Step advance rule: Tied — the note pointer moves with every clock step (rhythm gates choose which steps are silent). Free — the note pointer only advances on rhythm hits (silent steps don't consume notes).

SCALE tab

Transpose	Scale	RootNote
Global semitone offset (-48 to +48).	Scale to quantize the arpeggio output (same 18-scale list as on the Note page). Off leaves the held notes chromatic.	Root note of the scale (12 chromatic notes).

TIMING tab

Two pages.

Page 1

ClockRate	Length	Swing	Ratchet
Step rate as a clock division: 1/64, 1/32, 1/16 (default), 1/8, 1/4, 1/2, 1 bar. Determines how many steps fit in one beat / bar.	Gate length of each step as a percentage of the step duration (1–100%, default 75%).	Swing amount applied to off-beat steps (0–50%). At 0 every step is evenly spaced; at 50% the off-beat is delayed by half the step length.	Number of repeats per step: 1, 2, 3, 4. With 2+, each step fires that many sub-pulses with the same note.

Page 2

Prob.
Probability that each step actually plays (0–100%, default 100%). At lower values the arpeggio drops random steps for a sparser, evolving feel.

RHYTHM tab

Algo	Param1	Param2	Length
Selects the rhythm algorithm that gates which steps actually trigger: Off (every step plays), Euclid, Fibonacci, Golomb, Aksak, Binary, Turing.	First control of the active algorithm (1–32). Meaning depends on the algorithm: hits, density, preset selector, seed…	Second control of the active algorithm (0–31). Meaning depends on the algorithm: rotation, spread, lock/chaos…	Pattern length: Auto (matches the held-note count) or 1–32 steps. The arpeggiator advances its note pointer through the pattern according to Advance mode.

The rhythm algorithms are the same family used by the dedicated Rhythm Generator Note FX — see that page for the per-algorithm behaviour of Param1 and Param2.

Tip: combine Hold = On with Probability < 100% and a low-density Euclidean rhythm for evolving, generative arpeggios that keep playing after you release the keys.