QuantiChord: New MIDI Chord Generator For iOS (+ GIVEAWAY!)

Quantizers are a familiar creative tool for all those into modular synthesis (they are actually among our favorite modules!), but what if you just want to use your mobile device?

QuantiChord, the new app by StepPolyArp’s developer Laurent Colson, is 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 Audio Unit MIDI effect plug-in (and you can get it for free, see below!)

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.

The application supports full internal and external MIDI connections for input and output. An internal sound bank is included.

The Audio Unit MIDI effect plug-in supports multiple instances. A compatible host is required to run the plug-in. The host must support the Audio Unit MIDI effect format.


  • Standalone application and Audio Unit 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
  • Full support of “Split View” and “Slide Over”

An introduction to QuantiChord:

Compatible hosts supporting Audio Unit MIDI effect:

  • Cubasis
  • Audiobus
  • AUM
  • BeatMaker
  • apeMatrix

Supported MIDI connections:

  • Virtual “Core MIDI” connections between applications
  • iOS compatible MIDI interfaces
  • MIDI over Wifi

An iPad or iPhone with iOS 12 or later

Pricing & Availability:
QuantiChord is available now from the Appstore for $6.99.
Further information can be found on the QuantiChord product page.

Giveaway Time!
We have a few FREE CODES for our iOS users.
How to win? Just leave a comment below to win your copy of the app: how about the title of the song with your favorite chord sequence? 🙂

UPDATE: the giveaway has expired. We’re now going to pick and contact the winners, make sure you check your inbox!

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