How to find a repeating section in an audio file?

Question

Algorithms

Good afternoon.
The essence of the problem is this. There is an audio track, for example, a recording of a radio broadcast, you need to find repeating pieces in it, for example, ad blocks, and get something like a hash of this repeating piece.
Is there a code example on github that implements something like this? Or what materials you need to read in order to navigate and implement this?

Answer 1

If the length of the piece is known, look for the dreaded word "autocorrelation".