How can I print to console the max frequency (or the max band) every 10 ms or every time the frame updates? Patrick Vlaskovits October 16, 2017 08:12 Follow Use printf or NSLog. You can set the buffer size of the audio processing callback, the size of 512 gets you roughly 11 ms Related articles I can successfully get the BPM for an audio file, but I don’t see a way to get the beatgrid. Why is that? I'm researching how to graph the sound from each mic of the iPhone individually in realtime (there are 3 of them on the device). Can Superpowered help me? Comments 0 comments Article is closed for comments.