QuantiChord

QuantiChord

MIDI Chord Quantizer

11 ratings
5 reviews
#193 in paid Music
🎵 Music
$12.99

Details

  • Released
  • Updated
  • November 16, 2018
  • January 29, 2026
QuantiChord screenshot #1 for iPhone
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About

This app generates chords from incoming notes and quantizes them to a selected scale. It functions as a standalone application or an AUv3 MIDI effect plugin, offering extensive MIDI connectivity and an internal sound bank.

Standalone app and AUv3 MIDI effect plugin
Chord generation with transposing notes
Scale quantization
Full internal and external MIDI support
Internal sound bank
Preset management and sharing
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What's New in QuantiChord

2.3

January 29, 2026

• New option to automatically stop Audio Background when the app is inactive (15 min, 30 min, 1 h, 2 h, or never) • Minor bugs fixed

Charts

Top Paid

📉 193-20

Music

This app dropped -20 positions in Music chart.

Last updated on June 13, 2026.

User reviews

Quite reliable, perfect tool.

This is kind of a perfect tool for at least two occasions. Best of all, I don’t recall ever having any hanging notes while using this. Which can’t always be said for others.

The two functions I use this most for are:
1. Forcing a scale. You can deselect notes you don’t want to play. As a bonus, this feature is ‘after’ the interval choice option. So your chords stay in key.
2. Intervals from a single key press. It’s not something I need on every channel. But when I need this function (which is periodic occasions), this is my absolute go to. Sometimes it’s just octave stacking. Other times it’s 7th chords. Etc. this just does the job.

I have not made much use of some of the additional preset recall features or locking feature. I really should.
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Adds a “chord memory” mode to any AUv3 instrument!

Some synths have had a “chord memory” mode where you can program in a chord. Then when you play a single key, it plays that chord transposed to that note. By using AUM to route MIDI through this app, you can effectively add such a mode to any AUv3 instrument! It also lets you limit what notes it will generate so that—unlike most “chord memory” features—you can restrict the chords generated to a particular scale This—for me—makes it quite a bit more useful.

I think it could be improved by adding a display of what notes it is actually generating so that you could understand exactly what the quantization is generating.
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works perfect

no wrong promises, no bugs

Good tool, could need an update IMHO

1) It would be great if we could get the params for the channels (why not???)

A master control to switch channels would be good.

2) Randomize for the channels and tune too?

3) Transpose 8 never gets randomized?

4) Please refine the randomizer, it spits out way more high tones than low ones (randomize>reverse order?)

5) Please, and this one is really important:

Give us for all sakes a swipe option for the transpose levels.

5 Stars if the next update covers the above.

Really good app, but needs an update, IMHO.
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Downloaded, tried, then deleted.

I can’t think of a single application this could be used for. Quite useless.
Doesn’t even tell you the chord makeup..
Can’t organize chord progressions.
What did I pay $7 for?
Nothing... unfortunate that I cannot get my money back.
App downloaded, and deleted.

Developer apps

FAQ

What is QuantiChord?

QuantiChord is a MIDI effect that creates chords from incoming notes and quantizes them to a chosen scale. It can be used as a standalone app or an AUv3 MIDI effect plugin.

How does QuantiChord generate chords?

It adds up to 8 transposed notes to the original note played. The resulting chord is then quantized to fit a pre-defined output scale.

What MIDI connections does QuantiChord support?

QuantiChord supports full internal and external MIDI connections, including virtual Core MIDI, compatible MIDI interfaces, MIDI over Wi-Fi, and MIDI over Bluetooth.

Can QuantiChord be used as a plugin?

Yes, QuantiChord functions as an AUv3 MIDI effect plugin. It requires a compatible host application that supports the AUv3 MIDI effect format.

What hosts support QuantiChord's AUv3 plugin?

On iOS, hosts like Logic Pro, Cubasis, Beatmaker, AUM, and Audiobus support it. On macOS, Logic Pro 10.7 or later is compatible.

Does QuantiChord have ads?

No, QuantiChord does not contain advertisements. It is a paid application.

What is the price of QuantiChord?

QuantiChord is available for a one-time purchase of $12.99.

How often is QuantiChord updated?

The latest version is 2.3, released on January 29, 2026. Updates typically occur to improve features and compatibility.