Hi Thorrild, thanks, it is not that, as the section is a copy and paste that plays fine first time around. It is very odd as it sometimes degenerates into a sort of feedback howl... Maybe corrupted? I will overwrite and see if that works.
Cheers, J

I get some severe crackle and a loud tone on a few parts of a track. The headphones are fine, as are other audio tracks so it looks like it is coming from notion. Amy suggestions? Cheers.