since ur using the nnxt.. every hit is inputed manually. You can actually just go into the measure that u want to mute and delete those notes.
or you can create a mixer track and record an automation of u clicking mute on the nnxt.
first way is mad easier tho.
............... no one denied that wav is 'better' than mp3...
we said u cant give it some extra quality by converting..
jeez.. some learn fast.. some learn slow...or never.