KeyFinder ~ Musical Key Song Analyser

KeyFinder 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.

keyfinder

Mac / Windows

Website

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Mixxx ~ DJ Your Way. For Free.

Mixxx has everything you need to start making DJ mixes in a tight, integrated package. Whether you’re DJing your next house party, spinning at a club, or broadcasting as a radio DJ, Mixxx has what you need to do it right.

Mixx-2.0

Cross-platform, extensible, multi-language, open source & skinnable freeware. Support for iTunes, MusicBrainz, ReplayGain and Traktor.

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