Hi there, 
 
New to this forum, did a quick search and couldn't find what I was looking for, so apologies if this has already been covered. 
 
I'm running Sonar through a Focusrite 2i2 currently. I'm trying to find a setting within Sonar that allows me to adjust the metering level so that 0db = -18dbfs. This is a setting I can find easily in Pro Tools and other DAWs but seem to have trouble finding in Sonar. 
 
Any help would be appreciated. 
Thanks

This is not currently possible in SONAR. Assuming the intent is to use K-System metering you'll want to look into using a 3rd-party VU meter plugin (mainly needed on the Master bus) like this:
 
     http://klanghelm.com/cont../products/VUMT/VUMT.php

Thanks, I figured as much because it was impossible to find. What a pain. Thanks!