New open source key detection tool

Hey all,

I just finished a computer science course and built a key detection tool for DJs as my final project. The tool is called KeyFinder. It's designed to work primarily with EDM, but it's highly tweakable and I've had decent results with various genres.

In addition to a batch key detection interface which can write to metadata tags, it includes a musical visualisation tool called a chromagram. I've found this quite useful for visualising chord structures, melodies and key changes, and I believe it's pretty unique in the DJ software world; I haven't seen any other tools that have something similar.

I got good accuracy during my experiments but unfortunately I didn't test it on a wide selection of music. I had very little time and had to key it all manually and then get the results verified. It would be great to improve KeyFinder to work on a wide variety of genres.

So I'm releasing it for free under the GPL, in the hope the community finds it useful. It's a bit primitive, and for Mac only at present, but it should be pretty simple to port to Windows if there's interest.

If you want to try it you can download a Mac binary here. My write-up which describes the algorithms is also there if you're into that kind of thing. If anyone has any interest in working on it, or any comments or questions, feel free to get in touch here or using the email address on that page.

Cheers