Just recently (last two days) when I open CWP projects (with audio saved with the project) Sonar is pitching the audio a semi tone lower. Shut down Sonar and re-open problem goes away for one project. Open a new one and the issue comes back??
 
These are all finished projects I am simply re-visiting to make minor tweaks to.
 
It is really weird, and no the clips are not groove-looped, nor are any there any pitch affecting VST's in the projects either .
 
Anyone else experiencing this?

Sample rate issue with the audio interface maybe?

Yeah it could be, but these have had no issues with SR mismatch previously - but I will check it using some test files and the Sonar import SR conversion algorithm.
 
Thanks for the suggestion

Yup sounds like samplerate mismatch >.< I have had battles with this quite a few times, doesn't seem like it is interface specific as i've experienced the issue with multiple interfaces. In fact I haven't bothered doing any recording for the past few months, at least not on some of the tracks I was working on as I found this problem cropped up in a couple of projects and it became a ball-ache to sort it.

Sounds like the difference between the project being recorded at 48Khz sampling, saved. Then, the default sample rate for Sonar is later set to 44.1Khz. After that, reopening the CWP project, but somehow, Sonar keeps it in the new default sample-rate.
 
In preferences, under (Advanced) Clock, you may check to see that the Clock source is set to Audio.
 
Otherwise, I don't know why a simple restart fixes the issue. That's a little weird.

Sound card sample rate and project sample rate must match or you will get a lower or higher pitched version of your song

When this happened to me it was when ever I played a song in Windows Media Player then return to Sonar it would have changed the rate. It was the share drivers option that fixed it for me.
And I believe that going from 44.1 to 48 results in a slow down? 

If the audio was recorded at 48k... and played back at 44.1k, it would be lower in pitch
Liken it to a record player.  (showing my age here)  
Playing a 45-rpm record at 33-rpm drops the pitch

Thanks guys - good words! From the above I have sussed it out I think. I usually leave everything at 48k but these projects were originally audio tracks created in another app at 44, and that indeed was the problem.
 
As an interesting aside in reply to Cactus - yep the same thing happens here - I finish up a project, create the MP3 backing track to the data folder for same (bearing in mind Sonar MP3 maker only allows 44.1/16bit conversions), and then play it using WMP to check for pops and crackles at the start. Then when I return to Sonar and load another project the pitch shift happens. I suspect that a reload of Sonar works as it is restoring all my Sonar boot-up preferences...
 
 
 
 

Thanks, guys.  I used to do everything at 44.1, and I have recently switched to doing all at 48.  Knowing what to look for if I face this issue is TREMENDOUSLY helpful.
 
I learn things every day from this forum - thanks again to all.
 
Bob Bone