Changing audio tempo

John Payne
I've got an audio backing track that I would like to slow down about 10%.  Seems like I did something like this before simply by selecting the audio clip then Process:Length:Duration - etc., but nothing changes when I do that.  Guidance appreciated.
 
 

Process Length still works, just make sure you have the check box for audio ticked. You can also stretch the audio in real time (Process renders is down) by either slip stretching (holding CTRL and Shift and grabbing the edge of the clip), stretching it from the AudioSnap section of the Clip Properties in the Inspector, or you can set it to follow the project tempo with either AudioSnap or Melodyne. If you've just got a single chunk of audio, Slip Stretching is probably the easiest method.