Download Beat Detections FREE Unity. 

Beat Detection detects beats in realtime from any audio source.

Fully tested on Unity 2018 and 2017

Main features 
-Beat detection in realtime
-Mobile friendly
-Works with audio source and microphone
-Integrated with 3rd party systems such as PlayMaker
-Event-based system
-Fully documented
-A lot of demo scenes, tuned to work with a microphone, audio input, mobile, etc…

Beat Detection Algorithm can detect the beats of any audio source in realtime by using frequency spectrum analysis (FFT), audio energy or both simultaneously.