So I did a song with a bunch of tracks complete but now I want it all a bit faster.
I tried selecting all tracks, unfroze tracks, choose Views/tempo and hit + and changed 70 to 75.
Some of the tracks changed but others did not. I can't see why.
Is there a missing step? 
The manual talks about using Audiosnap but that is not the way Scott Garrigus suggests in his Sonar X1 Power so I'm left thinking the manual might be out of date?

If they are MIDI tracks they should follow any tempo changes. Audio is a little bit different but a whole song is still relatively straightforward. There's a video on my youtube page that covers it.

That doesn't make sense to me.  It is my understanding that Sonar only supports one active tempo at a time - that tempo is global.  (I have also never tried to work with more than one at a time, so it it does support it I have no experience with it).
 
It sounds like there may be tempo changes embedded within one or more clips.
 
Sorry I don't have more ideas.
 
Bob Bone
 

My guess is the clips that didn't follow the new song tempo aren't Groove Clips.
 
I decided to postpone any audio recording until I'm very happy with the current project tempo (when using Sonar).
The reason can be found here:
http://forum.cakewalk.com/tm.aspx?m=2829475&mpage=1
 
 

Thanks Guys
Most of my trax are audio with bass and drums as midi, so it's a mix.
I'll check out the links and get back.
I'll also look into which trax did not like the change to see if there's a clue there.
An interesting thought about making a whole audio track into a groove clip.
PS Bob, there are no tempo changes within the project

I'm going to venture a guess that the MIDI tracks changed and the audio ones did not. MIDI will automagically follow tempo changes but audio tracks require some fiddling. Take another look at the tuts/manual sections on groove clips. Also look at the sections on the various offline rendering options (the default ones may introduce artifacts so you might want to try the others... they can be access track by track in the Inspector under Clips > Groove Clips... or Audiosnap I forget which sub menu but there are other options as well) and Audiosnap in general. It is, in theory simple to just enable groove clip but there is more to the process than that underneath the surface. It's cool stuff and worthwhile reading. I've been slogging through a bunch of it myself recently. Cheers.

I followed Karl's method with Audiosnap but it didn't work for me. I got a pile of artifacts that seemed too much work to fix.
I couldn't make groove clips from the audio tracks as it was grayed out.
Thanks guys for the input but I'm going to admit Sonar is not the best way to do this, at least in this case.
The easy way is to use Audacity which does a fine, one click fix on the bounced file.

Setting up the Offline render options and bouncing is the way to go if you are getting artifacts. Trying the different settings will give you varying results. If you just set the clip to Groove Clip and adjust it you will be using the online rendering which pretty much always adds artifacts. It's more meant to let you do your editing before you do the offline render.
 
If you have already tried this then perhaps the tempo change is too great for even the offline algorithms to deal with but if it is only a slight tempo change that should not be the case. Sometimes it takes a couple tries at rendering too to get a render that is artifact free. Cheers.

I have done this once by converting the audio tracks (selecting all clips in a track, and converting one track at a time) into Groove Clips as Beepster suggested.  You might have to adjust the Groove Clip length in the clips properties (it's usually twice as long when converted), but it's a pretty simple process.  Once you have the tracks playing at the desired tempo, you can then convert the Groove Clips/tracks back to standard audio clips.
 
Kind regards,
 
Living Room Rocker

Beepster has it nailed. The offline render should be much better, if not it's probably a bridge too far for audiosnap.