Hi, I wonder if anyone can advise me (a relative beginner) on how to "flutter" a note? We have been given a lot of new music, and one of the pieces not practiced yet is "Overture to Mack and Mabel". My tenor horn part has two passages marked as flutter, one on three minim A's and the other on G's. I really would like to have some idea of how to do this before we actually start practicing it. Any advice gratefully received, thank you.