I am a trumpet player in a regional orchestra as well as a band director and a part-time freelancer. I bought this app out of curiosity primarily to determine if it would be a good way to practice finger dexterity when I can't play the horn. I quickly notice some things that I did not like. First, I did not like that you cannot change the rhythm away from four quarter notes. Second, and vastly more important, I could not find a position that would allow me to "play" the horn on my iphone/ipad and view the music without causing severe pain on top of my hand and in my wrist. This is extremely disconcerting because carpal tunnel and tendonitis runs in my family (my sister had to drop out of a graduate program at North Texas because of this issue when she played trumpet). Therefore I have had to delete the app before I cause irreparable damage to my hands. HOWEVER, the concept of the app is fantastic.