Playback Engine Problem

[mrussaustin]

I have Pro Tools 9, and run Mac OSX 6.8 Macbook Pro. I use a Fast Track Pro as my interface. Initially my session was running fine, with just drums, which I imported from a 16 track. There are about 8 tracks with at least an eq and compressor on each. I started to record bass, but halfway through the play back engine would quit. I disconnected the Fast Track and reconnected it to get sound running, but then when I re-opened the session it happened again. I tried resetting the buffers in the playback engine, but then something worse happened. Now I can't even access the playback engine. A dialogue comes up which says "could not complete playback engine request because volume(-35) was not found. I thought that this might be a laptop problem, so I went to school where they have a very nice system and the same dialogue comes up.