I'm tearing out what's left of my hair... 
 
I'm using AD2 as a drum VST. I can go into its Map Window and see which kit pieces are triggered by which MIDI note on a keyboard replica. Every AD2 note is off by two octave ranges compared with Sonar's PRV, where I can see the MIDI notes AD2 is generating in the PRV grid. So, for example, the AD2 keyboard replica is indicating the open snare hit is Midi note 38 and the key on the keyboard is D1. But in the PRV, that note is D3. Same for the kick: AD2 says note 36, key C1. Sonar PRV says C3 (there are no MIDI note numbers in the PRV, just the standard piano keys). 
 
This is mind pretzel. I know there are two Midi conventions, which revolve around what is considered middle C. One convention says C3, the other says it's C4. It may be a USA/European thing? AD2 is a European product. Sonar is an American product. Even allowing for the possibility that they're using the different conventions, that's a difference of only one octave/key range on the keyboard. I've got a difference of two octaves/key ranges between the two keyboards.
 
Any body else have this issue? It's really a PITA because I'm trying to create a custom MIDI map in AD2 for Slate Drums4 and it's not working 100%, and I don't know if this issue is part of the problem.
 
Any suggestions/insight would be greatly appreciated!
Billy
 

Billy,
I think a “drum map” for AD2 will solve your problem. You need to download a small custom drum map file and load it into Sonar. Then when you open the PRV you will see the correct drum sounds “mapped” on the left side of the screen. Search for AD2 drum map and you will find instructions. The file you need can be downloaded here:
http://www.azslow.com/ind...nloads;sa=view;down=46
Good luck!

Yes, many would use a drum map, here is a KB article about it including AD2 drum maps and templates
 
Still if you want to shift with what notes the MIDI values display in the pane view use Preferences > Customization > Display "Base Octave for Pitches"
 
Right-click the keyboard to change from a keyboard to a different display. It is possible to add additional note names to display.

Billy86
 This is mind pretzel. I know there are two Midi conventions, which revolve around what is considered middle C. One convention says C3, the other says it's C4. It may be a USA/European thing?

It’s a Japan/Japan thing. Whether note 60 is C3 or C4 goes right back to the early days of MIDI. Roland decided to call it C4, Yamaha called it C3 and since rhen other companies have picked one or the other.

The try these suggestions Thanks for weighing in.

 Click on "?" in top right corner of AD2.
 Click on "Map Window" in the drop down window and select "GM" as default setting and your map alignment problems will be over.
 
AD2 has it's own strange but kinda cool proprietary mapping that is kind of laid out as a physical drum kit(s) which seems to change "key" assignment positions depending on what drum instrument/piece/samples are used in the AD packs.
 
Cakewalk PRV and step sequencer are laid out in a traditional standard General MIDI format.