I use Toast Titanium 7 on an eMac G4 (PPC), OS X 10.4.11. I recently found that audio CDs that I have burnt (using Toast Titanium and my Mac's built-in optical drive) took a very long time to mount when re-inserted into the drive at a later date. The drive made a rhythmic noise for up to 2 minutes before settling down and letting the disc icon appear on the desktop. After much investigating, I discovered that on a previous occasion, when I was making a multi-session data CD, I had left the advanced recorder settings at 'write session' instead of 'write disc'. When I re-set them to 'write disc', the problem with newly-burnt audio CDs disappeared. (There is presumably nothing that I can do with the old ones!) But what puzzles me is that it is in any case impossible to make multi-session audio CDs so how and why did leaving the recorder set to 'write session' affect the way audio CDs were burnt? I should be most grateful for any ideas or information about this.