The sampling rate is fine -- 44.1 in Sonar and 44.1 in my interface's software. 
 
At this point, it's only one project that's messed up.  Last night, I went into my interface software and checked, "disable host control," and that made You Tube start playing music at the correct speed (I didn't try Spotify or anything, but I GUESS that would be ok, too).  Then I went to record keys again in my new project, which was still messed up....everything is sharp by a half or whole step, I can't remember.  I went into another project from a couple of weeks ago, that one was fine. 
 
A few weeks ago, I did make a "project template" file which has all my stuff already laid out so I don't have to start from scratch every single time.  Maybe I clicked something accidentally to slow down the project?  It DID happen to the project I described above, the one I had recorded a couple of weeks ago and I had to re-record all the audio..... thankfully it wasn't much that time, and it has been fine since then. 
 
To answer your question -- I rarely use any of the crazy synths or anything.  Last night, I was using True Piano and just doing something piano stuff.  The mod wheel was all the way down, on "minimum."

I will play around with my Keystation 88 ES controller today, and see if I can figure out anything else for you to look at.
 
Does this project by chance happen to have imported audio?  My son created a project that had playback issues with too slow or fast (cannot recall which, but it certainly wasn't playing back correctly), and it ended up having something to do with the nature of a specific set of imported audio.  If you respond back telling me you DO have imported audio, I'll go off and look at that project and rediscover what we figured out to fix it and give you that info.  :)
 
And separately, it seemed to me from reading your post like you may be sharing your audio interface drivers between both Sonar and having it used as the Windows Default Audio Device, as a separate observation.  Is this indeed how you are running?
 
Bob Bone