
I also put a VCA group on the drum channels and pulled them all the way down.no effect. Same thing.no change.all audio still there. Then I make a big change which is to pull the drum bus which is routed to Stereo Output 1/2 all the way down so I can at least know that the drums are muting. Though you will probably never experience this, there's an old and very unfortunate AIFF bug in Logic that can cause the AIFF file headers to corrupt and give you what appears to be unreadable 8 bit files. Went to bounce some songs to MP3's in Logic and as I'm comparing the MP3's to the original project (I realize it's not going to be a match, but more for levels etc.) I'm making small adjustments and not hearing them reflected on the MP3's. WAV is more cross-platform compatible and less error-prone - especially with Logic Pro.

(Original Post) I've worked in PT and Logic for a long time and I feel like I am losing my mind this evening. The only thing that worked was renaming the song MP3. I trashed those files or replaced them.to no avail. Its easy to get sucked into getting the perfect sound every time you open Logic Pro X, but its easier to mix your project. So you will never hear changes to your mix. It seems that iTunes "caches" or adds an MP3 track to it's library and if you click on an MP3 of the same name to play it, even if you have replaced the file with a new bounce, you will hear the very first MP3 of that song that you ever saved. (EDIT) - I've answered my own question but perhaps this will help someone else.
