i have a bunch of audio wav files that i imported into garageband and then i made another track with midi drums. there is a point in the song where the tempo drops 10 bpm, and then goes back to the original tempo. doing the master tempo automation is fine, but the problem is that when i change that section of the midi track and drop it down, all the audio files shift with it. i want the audio files to not shift and stay where they are on the timeline. I only want the midi track to change tempo. is this possible?