I'm working on a new project and have been creating some breath controlled NN-XT patches. Sometimes there are many layers in one patch - for example, a brass section with trumpets, trombone, and a few saxes.
What I found was I wanted to work on one zone (say the Tenor sax) without hearing the other zones (trumpets and trombones) and the NN-XT doesn't have a 'mute zone' button. The best you can do is turn the Volume down on the zone you don't want to hear, which is inconvenient to say the least.
Here is a technique that I started using when working on NN-XT sounds, especially one with a lot of layers.
Just remember to route everything back to outputs 1-2 before you save the patch.
Step by step
4. You're done! Now you can mute and solo any zone you want. Sweet!