Little Arp Monster · VST3 · AU · AUv3 · Win · Mac · iPad
An Arpeggiator That Goes Beyond
Most arpeggiators give you Up, Down, and maybe Random. Little Arp Monster is a fully programmable note engine with 16 play modes, a step-by-step gate grid, and deep randomization with a Spice dial that generates arpeggio ideas you'd never write yourself.
Programmable Gate Pattern Grid
A 16-step grid gives you precise control over every arpeggiator step. Four rows let you choose what happens on each beat: play a chosen scale degree, trigger the full chord, follow the arp mode, or anchor on the root. Steps with nothing active stay silent. The result is rhythmic complexity that goes well beyond a simple note cycle: you can build syncopated grooves, stuttering rhythms, and melodic hooks right inside the arpeggiator.
Deep Randomization
Hit Randomize and get a completely new arpeggiator configuration: mode, gate pattern, chord voicing, rate, and all. Mutate nudges a pattern you already like instead of rerolling it, and a single Spice dial sets how adventurous either move gets, from tasteful classics to ideas no traditional arp would land on. The engine is designed to produce musically useful results, not noise, and every generated parameter is fully editable, so you can keep what works and tweak the rest.
Flexible Chord Input
Feed the arpeggiator from built-in chord types, such as triads, sevenths, sus chords, 9ths, and 11ths, or use incoming MIDI from your DAW. Voicing options (Close, Open, Drop, Wide, Auto) shape how notes spread across octaves. Add bass notes below the chord, lock a pedal bass to the root, or strip it down to a single note. The chord is your raw material; the arpeggiator turns it into movement.
16 Arpeggiator Modes
Go far beyond the usual Up/Down patterns. Little Arp Monster includes 16 distinct modes: Up, Down, Up-Down, Down-Up, Converge, Diverge, Thirds, Skip, Pedal, Thumb, Spiral, Add One, Double, Stutter, Random, and As Played. Each mode produces a different melodic contour from the same chord input, giving you instant variation without touching a single note.
16 Independent Scenes
Each arpeggiator scene has its own chord input, mode, rate, gate length, octave range, and gate pattern, completely independent from every other scene. Build up to 16 different arpeggio variations, then sequence them over time with Little Arp Monster's Arranger, dropping markers along a timeline to swap scenes and walk a chord progression. What starts as a single arp idea can evolve into a full arrangement.
Per-Step Modulation Lane
A modulation lane sits on top of the grid, locked to the same 16 steps. Draw a curve to shape velocity for accents, filter cutoff to open the sound, decay to lengthen notes, or send any CC to your synth. Vary the pattern or switch scenes and the modulation follows, so the movement always matches the motif.