Just watched a video about using ProTools' TCE (Time Compression/Expansion) tool to stretch audio.  Anyone know if there is a similar feature in Sonar X2 Studio?

I don't know about Studio, but here is some info for Pro version
 
There is a stretch available under process/length. Then you click on audio. It is by Radius.
 
Also you can probably make a loop construction and acidize the clip to get where you want to go. Look on the net for how to do this. 
 
And I don't know if its still included but in the old Sonars they had a Direct X plug that was a time/pitch stretcher, a little bit out of date now. I still have it but it might be a carryover from an old earlier version.

Yes its called Slip Stretching. Hold ctrl while placing the mouse cursor at the end of a clip. It will change to the slip stretching cursor. You compress the time or lengthen it.   

John
Yes its called Slip Stretching. Hold ctrl while placing the mouse cursor at the end of a clip. It will change to the slip stretching cursor. You compress the time or lengthen it.   

Wow, always something to learn.
 
Do you know if the slip stretch is at the same quality as the Radial Process / Length approach?

Or switch to the Timing tool if your other hand is busy with something else.

John
Yes its called Slip Stretching. Hold ctrl while placing the mouse cursor at the end of a clip. It will change to the slip stretching cursor. You compress the time or lengthen it.  

I've not had good luck with doing that at all. That is one place I really think that Sonar falls short is in time stretching.

pharohoknaughty

John
Yes its called Slip Stretching. Hold ctrl while placing the mouse cursor at the end of a clip. It will change to the slip stretching cursor. You compress the time or lengthen it.   

Wow, always something to learn.
 
Do you know if the slip stretch is at the same quality as the Radial Process / Length approach?

Its not for a massive change in time but for small things it works well. For better control and less artifacts with a bigger change use audio snap. 

Yes, after slip-stretching, you select the stretched clip and press ALT+A to bring up Audio Snap, then select a desired algorithm from the "Offline" drop-down (check the manual for detail of the algorithms). Then apply Bounce to Clips.

What icontakt describes is crucial. If you don't render the track, the audio will stay in preview mode and sound less than wonderful, to say the least. You can get away with pretty big stretches if you use the Radius Mix algorithm.