"Beat Detection Algorithms" - https://www.flipcode.com/misc/BeatDetectionAlgorithms.pdf
- energy_beat_detector.ipynb - "Simple sound energy algorithm #2"
- fft_beat_detector.ipynb - "Frequence sound selected algorithm #1"
"Streamlined Tempo Estimation Based on Autocorrelation and Cross-correlation With Pulses" - http://webhome.csc.uvic.ca/~gtzan/output/taslp2014-tempo-gtzan.pdf
"OBTAIN: Real-Time Beat Tracking in Audio Signals" - https://arxiv.org/pdf/1704.02216.pdf