
I cant see any reason why particular files disappear. I might record ten different sections when working on a project before closing and sometimes none are affected, sometimes two or three.
When I look in finder the corrupted files are there but do not play in itunes or vlc. I have a retina mac 15" that is three weeks old so dont think this is a hard disk issue (have verified the disk with disk utility and seems to be ok).
I use ableton in arrangement view and record material into abelton via a komplete audio 6 soundcard. I am using live 9.1 with OSX 10.10.3
Update: If I save the file but do not close the project and check the samples in finder I see that some of them do not play. However they still work in Ableton