Updated Sonar. Old project files "Unable to open audio playback device..."

Updates often change things, like the default sampling rate and/or bit depth. If SONAR is set to one, and the update changes them to another, you'll get this message.
Ensure that those values are the same for both SONAR and the audio interface.

longskatermusicmaker
Hi Everyone,
 
I am running Sonar Professional and recently ran the update and can now no longer play back my older project files.    
My interface is a Presonus AudioBox 1818VSL.  I created these files with the interface so im a little confused.  Software and drivers are up to date. 
 
See the attached photo of the error message and my playback settings.     
 
Does anyone know what happened?

Thank you!
 
Ryan

As Greg implied, this is probably due to a Windows update.
 
The last Windows update seems to now default it's sound device to people's pro audio interface, but not only that it sets the sample rate to what IT wants rather than what you want. Also as Windows Edge now seems to run at startup, it's basically got it grabbed as soon as you boot up.
 
You can try setting the default sample rate within Windows to match that of Sonar like Greg suggested, but if you've got an in-built sound device, I'd recommend setting Windows to use that as its default. That way Sonar/CbB has complete control over your Presonus.

1.  Make sure all other audio devices are disabled globally, including  you internal computed sound card, any SPDIF devices (other than your Audiobox) and any HDMI-fed speakers in your monitor.  Do this in both device manager and in the little Windows mixer app.
 
2.  Also turn off all windows sounds in Control Panel.
 
3.  Finally, try changing your religion and praying to a different deity.  You can always switch back if that doesn't work