Ranges and pro version

I really enjoyed this app and I was mostly pleased with everything on it, except... I would love to have the option to be able to change the ranges on the tenors for different sounds, or maybe to change from concert to marching tenors, there are some songs that would sound better with different pitches on the drums. Thank you for your time and please add this feature. I will change to 5 stars once this is done.

High school drumline about Drumline, v3.0