Please don't laugh

I'm working with some audio tracks on X3 that I have been mixing for some time.  Tonight I tried to work on them and there is no audio.  The project loads normally.  The wave forms show up on the track view, but the meters in the console view show nothing.  Audio engine is on, nothing has been changed (that I know of) since I last worked on the project.  No solo or mute buttons on.  I'm sure there is a rediculously simple solution but I'm darned if I can figure it out. 

ALways start with the simple stuff 1st. Toggle the mute button, next the solo button, check any busses,  look in preferences and see if your audio card is showing up as an option.  Grab headphones and plug em into the sound card.  If the waves  are there, the audio is still there.  Re-boot the computer.
 

Thanks Jimbo.  I immediately came up with the same list and have tried each of your suggestions.  The meters on Sonar are showing nothing.

Yep, same old AudioBox selected in preferences.

Check your solo buttons....I had a similar problem and one track was solo'ed and that mutes out everything else. If not that, I'd double check the console view for level and output settings. You may be routed to a buss that's turned down. 

Did you start the project in X3?  I opened up a couple of projects in X3 that I started in X2 and nothing plays until I bypass every effect bin, effectively disabling all my plugins.  Then it plays.  I haven't gone through all of them one at a time to find the offender but that's what's happening when I have this happen...

Thanks Fog.  Great suggestions.  Did them all...........no go.  I got my hopes up because I had in fact moved usb ports.  Re-installed still no luck.

Hi Kev, that was my very first step.  Sound card is fine, works with everythnig else.

So you say the audio engine icon is lit up?

And you have reinstalled your audio device right?

If you have X2 still installed, does any project play in there?

check your I/O's (inputs /outputs in your track view or console view, do you see meters moving ?
if so its got to be an I/O issue, 90% sure.

I sometimes have trouble with a particular plugin that I mainly use on the master bus. It will not let sound through it sometimes. If I disable it, sound is instantly audible. Have you tried disabling all the plugins just to make sure one of them isn't your culprit?

Try bypassing your FX - press E on computer keyboard.

Don't know if it's been suggested or not, but have you checked your main outs in Sonar? Select your master bus and look in the inspector.

Bristol_Jonesey
Have you got any hidden tracks which might be solo'ed?

+1 ... that's a good one to check
 
are no meters showing anything or is it just a silent master bus (it could be as simple as having a fader down all the way which can happen e.g. with multiple CS - had that problem once that the A-PRO got stuck and kept sending MIDI messages which moved the faders that were off screen)
 
try another Sonar project and see if it happens there as well (if it does, it's set-up related - if not, it is project related)
 
could be as serious as a corrupted project (I got one at the moment that doesn't play but all meters are jumping) ...
 
 

I would create a new audio track and try to record some music on it. If you can do that and play it back (make sure you Solo it) then it would seem to be at the track level. If that's the case you would need to go track by track to find the offender. If not then I would try auditioning other projects. If they play back then you know it is only one project. If not you have some issue with your soundcard and Sonar.
 
Regards,

Great responses guys!  In response:
-multiple projects (5) tried in X2 AND X3 same result
-no meters moving
-no hidden tracks
-bypassed all plugins
-no other audio programs running
-reinstalled audio device
-audio engine on
 
I have another audio device that I have used sparingly (a Zoom R24) but it did work well with X2.  I'm going to hook it up and see if I have the same problem.