MIDI Chord Quantizer

App and AUv3 MIDI effect for iPhone/iPad
App and AUv3 MIDI effect for Mac

"QuantiChord" is a MIDI effect that generates chords from incoming notes and quantizes the results to a pre-defined scale. It can be used as a standalone application or as an AUv3 MIDI effect plug-in.

The chord is generated by adding up to 8 transposed notes to the original note played. Once the chord is generated, it is quantized to limit it to the selected output scale.

Download the documentation



  • Standalone application and AUv3 MIDI effect plug-in

  • 8 transposing sliders from -24 to +24 semi-tones (+/- 2 octaves)

  • 1 global transposer slider

  • Scale quantizer

  • Lockable parameter protection when switching presets

  • Resizable keyboard

  • Multitasking

  • Sample-accurate timing

  • Internal sound bank

  • Receiving MIDI from external MIDI sources

  • Internal routing of inputs, outputs

  • Send MIDI to a virtual port that can be used as MIDI input by other "Core MIDI" compatible applications

  • Random creation of presets

  • Presets browser

  • "Program Change" support

  • Preset sharing support by "AirDrop", "Mail", "Message" and other available services

  • Native iCloud support

  • "iCloud Drive" support in "Files" app on iOS and in "Finder" on macOS

  • Full support of "Split View" and "Slide Over" on iPad

  • 128 Undo/Redo levels

audio units

AUv3 MIDI effect plug-in included

Hosts supporting AUv3 MIDI effect on iPhone/iPad

Logic Pro, Cubasis, Beatmaker, AUM, Audiobus, NanoStudio, Auria Pro, apeMatrix

Hosts supporting AUv3 MIDI effect on Mac

Logic Pro 10.7 or later

quantichord screen-1

Full MIDI connection support

  • Virtual "Core MIDI" connections between applications

  • Any compatible MIDI interface

  • MIDI over Wifi

  • MIDI over Bluetooth


Presets can be synchronized to iCloud and available on all devices


QuantiChord Introduction

A video introduction to QuantiChord. The presets used in the music video are "The Power", "Too Easy" and "Augmented Major 7th".