I am not a musician but I am making a piano playing machine for a simple project. I need to trigger linear actuators which push the piano keys. I can use midi interface to trigger the actuators but I can't do that for some reason so I need to manually program the timing at which the actuators fires. So, I need to know the tempo of the song which will tell me the delay I need to put in between each note. For, example
As you can see there are four notes being pressed by the right hand in the first iteration. i.e F Bb C F then G Bb C F and so on. I need to know the timing between each note. I tried FL studio, imported the audio and got a BPM of 68.5. BPM is also an entirely new concept for me and I don't trust a software. So, does anybody know how I can calculate microseconds between the notes?