libkeyfinder src 55d5d57119edf982901c23627cd37c621cc2702909cf166e55c0505cc1e4b11c Musical key detection for digital audio libkeyfinder is a small C++11 library for estimating the musical key of digital audio. angrypenguin <angrypenguinpoland@gmail.com> https://mixxxdj.github.io/libkeyfinder/