[squidsquad]

PT is reading the metadata of the audio files to determine whether it should 'match' them based on criteria in the files.

If you select 'track id' as the match criteria, then command-click on the highlighted region with the selector tool, any other audio file that has the same 'name' in it's metadata and overlaps in time will pop up in a contextual menu. Selecting another file from the menu swaps out selected audio for the other file.

It's useful if you have an eight-track field recorder, and have eight tracks of production audio from a film shoot. With one track in the session, you can highlight a word or phrase, and swap it out for another channel (i.e. boom to radio or one actor's radio to another actor's radio).

It gets interesting when you use sibliminator from maggot software. Sibliminator takes a group of files and forces then to be siblings, then if they overlap in time, you can swap them out using the technique above.

We use if for ADR - all the takes get sibliminated, then individual words can be swapped (for example).

It has applications in music too - sibliminate your vocal tracks, and comping is a breeze.