openFrameworks Addon for Real-Time Beat Tracking - Based on Adam Stark's BTrack algorithm
BTrack
https://github.com/adamstark/BTrack
btrack~: Max/MSP external
https://github.com/naotokui/btrack_external
This is an addon for beat tracking, not for onset detection! Each occurance of sudden attack/inpulse of sound (onset) doesn't matter in this case. Instead, the algorighm tries to find a constant beat and track the location of each beat in incoming audio signal.