Christmas Medley - Trumpet Quartet 

I'm not sure exactly what you mean, but realistically as long as they are 4 instruments in the same key, it will work!

@@musikapublishing I was talking about the audio. It just didn't match the music. As long as it's in the same key it should work.

You would think a music publisher would know this is written for a piano./midi or whatever the hell they are playing and NOT A B FLAT TRUMPET-DUH lol???