BLEASS Arpeggiator

Name: BLEASS Arpeggiator
Price: 29 USD
Author: BLEASS

by BLEASS · Utility · MIDI arpeggiator

Not rated yet

BLEASS Arpeggiator is a MIDI arpeggiator that adds polyrhythms and polyphony to the classic synth arp, made with French producer Canblaster.

It has a large set of configurable patterns and costs €39 (about $44.28).

Best for: Keys & Synths, Bass, Sound Design. Genres: Electronic & EDM, Pop.

Keywords: synths, bass, rhythmic, bus processing, classic, creative, inspired by, mixing, simple, sound design, steep learning curve, tempo-synced, utility.

What it does

BLEASS Arpeggiator is a MIDI arpeggiator developed with the French producer Canblaster, built to get past "clichéd up-and-down monophonic patterns". It adds polyrhythms, polyphony and modulation, and includes its own synth so it makes sound on its own.

Trigger section: the clock, synced to the DAW, with groove, time multipliers and settings for how it responds to incoming MIDI.
Patterns: 62 rhythmic patterns of different lengths, with a Chance control for randomness; patterns cycling at different rates create polyrhythms.
Sequence section: 20 play modes, from up, down and up-down variants to walk and climb modes and patterns inspired by Debussy and Morricone, plus gate length, note repeat, octave range and how often the sequence repeats.
Polyphony and chords: up to 4 notes per step plus an optional bass note, and a chord mode.
Modulation: two LFOs with waveform, smoothing and time shaping, a step-based Motion Sequencer, two mod-wheel destinations and two X-Y pads on a Performance Board.
Built-in synth: a double FM synth for sketching without routing to another instrument; each instance also has its own MIDI bus for driving external synths.
Loading: it runs as a MIDI effect, or as a synth in most DAWs; in Logic Pro it works only as a MIDI FX plugin.

A demo is available.

Source: BLEASS product page

When to use it

BLEASS Arpeggiator is the better pick when you want an arp that keeps evolving on its own, thanks to polyrhythmic patterns, Chance, two LFOs and a motion sequencer. Compared with a DAW's stock arpeggiator, such as Logic's or Ableton Live's, it adds polyphonic steps, an FM synth and live X-Y control. Compared with Xfer's Cthulhu it has no chord-memory module, but goes much further on rhythm and modulation. Unlike LFO Tool or ShaperBox 3, which shape audio, it works on MIDI notes, so it can drive any synth. Its modulators can't send MIDI CC to external gear, which limits it as a full sequencer.

Best for: turning held chords into moving, polyrhythmic arpeggios, generative sequences and live arp performance.
Genres: EDM and dance music, synth-pop, ambient and soundtrack work.
Look elsewhere if: you just want simple up-down arps (your DAW's arpeggiator will do), chord memory (Cthulhu), or a step sequencer that sends CC to external synths.
Tip: start from the factory presets to see how the modulators are used, then build your own patterns.

What producers say

Reviewers rate it highly as a deep, hands-on arpeggiator at a low price; the gripes are about modulation routing and a learning curve.

MusicRadar (Stuart Adams, March 2024) gave it a Highly Recommended verdict, saying its synth-style controls make arp creation "an intuitive, creative, hands-on process", and praised it for generative music and the polyphony.
Magnetic Magazine (November 2024) also called it Highly Recommended, praising the polyrhythms, the Motion Sequencer, the Performance Board for live use and the internal FM synth.
Criticisms: the modulators can't target the built-in synth or send MIDI CC to external instruments (MusicRadar); Magnetic found a learning curve and a smaller preset library than some rivals.

Where to buy

Plugin Boutique: $29 (regular $39)
Best Service: $39
PluginFox: $39
AudioDeluxe: $39
BLEASS: $44.28 (€39 converted to USD (ECB rate, 29 Sep 2026))

Tutorials and reviews

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