Thanks for playing and the feed back, glad you stuck with the music, i can imagine it got a bit tedious after a while
The math for the frequency was actual very simple because it didn't had an offset. I knew the target and i knew the current at any moment.
than for a simple score i could just do
var amp_diff = abs(amplitude - target_amplitude) var freq_diff = abs(frequency - target_frequency) score = 100.0 - (amp_diff + freq_diff * 100.0)