Device Details

Device Overview

Name/Version: DIFF Devices - KEYMATCH 1.0
Author: DiffDevices  

Keymatch is a key detection tool with a built in pitchshifter.
For DJ’s and Producers interested in harmonic and tonal mixing.


• Key detection Tool (*)
• Pitchshifter with 4 quality alternatives
• Target notes regarding pitch
• 4 Themes*

Is an open source key detection tool, for DJs interested in harmonic and tonal mixing. It's intended to be very focused: no library management, no track suggestions, no media player. Just a fast, efficient workflow tool. It supports a huge range of codecs thanks to LibAV, and writes to metadata tags using TagLib.

The accuracy of the algorithm is pretty good. Here's a comparison with some other packages. I don't claim that KeyFinder is better than other key estimation software, but it shows that the algorithm is in the same league as even the best paid alternatives.

I originally developed KeyFinder in 2011 as part of my MSc in Computer Science. The algorithms, design and implementation are described in some detail in my project report, which you can download, though it's a bit heavy going.

More info :


1. Install in any location on your computer.
2. You can keep it closed the
3. Open ableton.
4. Drag and drop to the track that you want to find the key.
5. Press locate on KEYMATCH, and search for the
6. Be sure that on KEYMATCH, the is green.
7. Be aware that takes a few seconds to analyse the track, loops, or anything you want. (time depends on track size).
8. Now you can see the pitch and modifing it. On the right side of KEYMATCH you see the result when you modify the pitch knob on the centre.

To fit perfectly with Keymatch.
1. Go to the preferences of
2. Select custom keys.
3. Add the keys below.

A - 11B
Bb - 6B
B - 1B
C - 8B
Db - 3B
D - 10B
Eb - 5B
E - 12B
F - 7B
Gb - 2B
G - 9B
Ab - 4B
Am - 8A
Bbm - 3A
Bm - 10A
Cm - 5A
Dbm - 12A
Dm - 7A
Ebm - 2A
Em - 9A
Fm - 4A
Gbm - 11A
Gm - 6A
Abm - 1A



* It requires to be installed on your system.

* Only works in Ableton Live with Max installed.

* It Requires Ableton Live V10.1 (minimum).

Device Details

Tags effect, utility, other, dj
Live Version Used: 10.1.18
Max Version Used: 8.1.5
Date Added: Jul 05 2021 03:50:18
Date Last Updated: Mar 05 2023 16:22:48
Device Type: audio_device
Download URL (report link)
License (more info): None


Wow. This looks very awesome.

Will probably grab this. I read the FAQ on your site. I'm a Windows user so fingers crossed all works well. Cheers.

...Odd. Tried downloading v1.25 (Windows) and my download is canceled due to "Malicious software" warning. Did it on two different computers. Never seen that warning before.

hi! do you know if it works on m1 mbp?

Keymatch is causing problems with time stretch, clips can only be warped shorter and not longer when key match is in a project (Live 11)

what version of Ableton are you using? I tested with Ableton Live 10.1 and 11 also, and I could not replicate what you are saying. everything is working fine here! Also tested in M1 and Intel in Mac and Windows. Thank you for your feedback

works great. I have no issues at all. helped me a lot to make dj mixes. Thanks again Diff Devices.

I just bought it! WOW amazing job as always. I'm really in love with the tools you make. I don't need mixed in key anymore. it's perfect.

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