Locking An Audio Clip

How do you prevent an audio clip from being stretched when you change the project tempo?  Thanks

When you raise the tempo in SONAR, audio clips will appear to stretch (and to compress when you lower it) because M:B:T time is the fixed reference while absolute time is malleable, visually. Rather than moving the timeline marks closer together when you raise the tempo, SONAR runs the Now cursor faster, so it will traverse the longer audio clip in the same amount of time, and the tempo of the audio will not be altered.

If you actually want audio to follow tempo changes, you need to enable Groove-clipping or the Autostretch mode of Audiosnap on it. Then when you change the tempo, audio will follow M:B:T time, and will, counter-intuitively, appear not to change.