I checked out the solution on github, but my results were not like advertised in the video. On my laptop it sounded like a dying cat of some sort.
The most common reasons in audio problems I've found are mismatching sample rates and a failure to meet the deadline of the audio interrupt, causing choppy or distorted audio. A mismatched audio format (ie. number of channels or bits per sample) might also cause problems.
Also, knowing what OS/Audio api backend is being used is vital information for debugging.
I can't affort to "nerd into" the actual problem right now. Hence the whitty and non constructive comment. Apologies.
EDIT: Looking into it further, I get that effect just loading up the provided .wav (which sounds fine in any media play) and not doing any processing on it, just trying to play it straight up.
EDIT AGAIN: Got it, the very low buffer size of 100 is casuing the problem. Using the default size and everything is working like a charm