Can anyone give me some advice about this problem: I opened a project from a few years ago in Logic Pro 8. I wanted to expand this film cue into a full song. I copied the file to work on. I moved some elements farther down the time line, to use later and set up to record some audio. The current track is a drum loop and five software instrument tracks, nothing complicated, about 40 seconds long. When I started to record, none of the existing audio would play back, though I had just listened to it and made changes. Nothing was soloed or muted. I tried closing the file, restarting my G5 etc. I copied the project again, and got the play back. After a couple of takes, I realized I needed to move the drum loops around to make more time for the verse. As soon as I did that play back stopped again. I undid my dragging and audio returned. I tried it again, with the same results. I copied the drums onto a new track, and was able to make the changes with out the fault. I've had playback stop before for no apparent reason. Usually closing the project will cure that. What do you think?