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Octachron MIDI Drum Sequencer

Version: 1.6.1
Sounds: Drums, Percussion
Updated: 03 March, 2023
$6.99     Download on the App Store

Octachron is a flexible 8 Track MIDI Sequencer with rich modulation and sequencing capabilities. It is optimized for drums but also fun for experimental melody lines. It works standalone or as AUv3 AudioUnit in your favourite iPad DAW (like AUM, Cubasis, Beatmaker, ApeMatrix or Nanostudio etc.).

“An exciting MIDI sequencer with advanced features” (Synth Anatomy)

“Particularly the probability parameters are a lot of fun” (Amazona)

“Octachron controls just everything with iPad” (Gearnews)

*Please notice: Octachron is a MIDI sequencer and does not create any sound of its own*

We believe in specialization, so Octachron is focused on in depth MIDI sequencing. Control your favourite iPad drums like Ruismaker or MV08, synths like Zeeon or Model D or any hard- or software MIDI instrument with it.

*iOS 11 or higher required. If used with a host software, this has to be compatible with the MIDI AudioUnit standard.*


- Standalone or AUv3 AudioUnit
- 1-32 steps with flexible clock divider and custom time signatures
- 8 mutable tracks with adjustable length
- Up to 8 chainable patterns (song mode)
- Swing with flexible swing grid
- Save and restore your presets
- Parameter lock for velocity, trigger probability, ratcheting and MIDI CC
- Scales generator
- MIDI control pattern selection and mute
- Customizable mapping and mapping presets

*Various MIDI mapping presets for popular drum machines*

- Ruismaker & Ruismaker FM
- MV08
- DM1 & DM2
- Axxon
- EGDR 606, 808 & 909
- Dadamachines Automat
- SB Drumcomputer
- Vanator
- FAC Drumkit
- NS2 Slate

*For melodic instruments generate various scales in all keys*

Octachron is optimized for drums but also supports standard scales like major and minor and also more unusual ones like mixolydian and phrygian. So you can even accompany mom’s church choir, if you like to :)
(See full list of possible scales below)

*Parameter Lock*

- Velocity and MIDI CC modulation
- Multiply number of hits per step with ratcheting
- Trigger probability
- MIDI CC on every step

*Track Settings*

- Assign MIDI notes to each track or use mapping presets
- Individual track length to create polyrhythms

*Live Performance features*

- Instant pattern switch option
- Mute function per track to easily build up layers in live situations


- Sequence other standalone apps, AUv3 AudioUnits or external hardware via MIDI
- Octachron derives its timing from the host application, its internal clock or via AbletonLink
- Trigger on different MIDI channels per track

*Supported Scales*

Major, Minor, Harmonic Minor, Melodic Minor, Pentatonic Major, Pentatonic Minor, Pentatonic Blues, Pentatonic Neutral, Ionian, Aeolian, Dorian, Mixolydian, Phrygian, Lydian, Locrian, Dim half, Dim whole, Whole, Augmented, Chromatic, Roumanian Minor, Spanish Gypsy, Blues, Diatonic, Double Harmonic, Eight Tone Spanish, Enigmatic, Leading Whole Tone, Lydian Augmented, Neopolitan Major, Neopolitan Minor, Pelog, Prometheus, Prometheus Neopolitan, Six Tone Symmetrical, Super Locrian, Lydian Minor, Lydian Diminished, Nine Tone Scale, Auxiliary Diminished, Auxiliary Augmented, Auxiliary Dim Blues, Major Locrian, Overtone, Diminished Whole Tone, Pure Minor, Dominant 7th