I wrote a very similar prototype a while ago. Here's a video - https://www.youtube.com/watch?v=oYZEDSzX7MU&feature=youtu.be https://www.youtube.com/watch?v=oYZE

I wrote a very similar prototype a while ago. Here's a video - https://www.youtube.com/watch?v=oYZEDSzX7MU&feature=youtu.be https://www.youtube.com/watch?v=oYZEDSzX7MU&feature=youtu.be I didn't realise at the time, but the X axis is not in logarithmic scale, so most of the audible frequencies are bunched on the left hand side.