Apple

Also in the doco it states:

"If you edit a music track after associating it with a music event iterator, you must discard iterator and create a new one."

If you were using MusicTracks to store note and controller information what is the situation with thread safety of the MusicEventIterator when used in a producer consumer type fashion. When using multiple threads I have the possibility that the MusicTrack will be edited while I am iterating. Will this throw an exception or will I just be iterating over stale information?

https://developer.apple.com/library/mac/documentation/AudioToolbox/Reference/MusicEventIterator_Reference/Reference/reference.html#//apple_ref/c/func/NewMusicEventIterator