Added option to meter options.  Sorry if this already exists couldn't find it in the manual.

Inter-sample (not "inner sample") distortion monitoring is needed ONLY for the master output bus, as it predicts the effects of D to A conversion. So it would be pointless to include it on all meters as there would be nothing for them to measure that was relevant, given the massive digital headroom of a 64-bit audio engine. Besides, X-ISM is a suitable meter plug-in that already exists, and is a free download from the SSL web site.
 

Thanks Craig, I downloaded it and will give it a try.  I still think it would be a nice new feature in Sonar!