I wonder if there’s some signal correlated enough with beat to stand in for my hand?
Edit: their code works on samples of audio. [0] A “real-time” solution could be short samples immediately processed after capturing until some quality metric is met.
[0] https://colab.research.google.com/drive/1tuOqNyO9gdMmYJsj33f...
Of course, you only hit the snare in 2 and 4, so you had to multiply it by two... and forget it completely during breaks!
What amazed me is that it was so sensitive that I could detect even normal footsteps on rather solid floors.
Say I have a mic on a stand at the back of a room (i.e. Earthworks M30), someone can enter the door from the opposite side, and quietly walk somewhere else in the room. The mic will pick up each step they're making in a pretty obvious fashion on a spectrograph in Smaart. Or a fan from an LED light hanging from truss in the ceiling.