muting midi sections in logic?

Can't you just run the volume to zero using volume automation?

 

If you are recording midi notes, etc., then all that should need to be done is to simply delete those midi notes that you don't want. If you want to shorten the midi notes, then how about opening up a midi event editor and shorten the value of the notes??

The wonderful thing about recording midi information is the editing capabilities. Notes can be lengthened or shortened, velocities can be made louder or softer, etc., etc.

I don't know your experience level of midi recording. Please forgive me if I'm sharing information that you already know. However, if you are relatively new to midi recording & editing, there's a bit of a learning curve associated with editing midi, especially with the Logic program (and, I guess in your case, the Logic Express program). If you are unfamiliar with Logic Express, get to know its midi editing capabilities. Most especially, get to know its "Piano Roll" and "Hyper Editor" midi-editing functions. These are very cool tools for editing midi information.

Good luck. . .