I've encountered a frustrating problem. I've recently recorded vocals for a song. At first, the audio played back perfectly in time, but after a few hours, the audio started to play out of sync. It plays very slightly ahead of where it should be playing. To troubleshoot, I have removed all plugins on the track, and put them back on. I have created a new track and copied the recording, but the problem comes back. I have set my recording delay to 0 samples. I'm very lost on where the source of the problem is; does anyone have ideas? To fix it, I can just drag the audio a little behind so that is plays where I want it to, but it occasionally switches back to playing back in sync, so I can't reliably keep it in one place and have it play correctly. Thanks for your help. Computer: Macbook Pro, 3.1 GHz i7, 16GB RAM Mac OS High Sierra 10.13.6