I want to upload my own XML file and then be allowed to choose which staves should be accompaniment. For example: I upload a choir song...I want my students to know their part....So the score has all of the parts in separate staves (example S1, S2, A1, A2, T1, T2, B1, B2, Solo, Choir reduction, Piano). I want to be able to have the option to choose which staves will be played for the accompaniment. I might want them to only hear the piano part as accompaniment or I might want piano and choir reduction. But the way it is now, everything is the accompaniment except for "my-part." Which means if a section of the song is in unison then the balance is WAY off because you now have all of the "my-part" staves (S1, S2, A1, A2, T1, T2, B1, B2) playing the same notes rather then just hearing a simple choir reduction or piano for accompaniment. I hope that I did not over-explain that. This feature in my opinion is a MUST! The teacher needs to be able to determine what the accompaniment should be...not just default everything but "my part." Thank you for all that you guys do. I think if I had this option it would make it complete for me and blow the competitors out of the water.