Instructions for Tuba auditions For the tuba audition, there are three excerpts, two from Aces by Robert W. Smith and one from Semper Fidelis by John Philip Sousa. If you also wish to record scales or a piece of your choosing, feel free, but it is not necessary. If one excerpt is too difficult, leave it out. We want to hear you at your best. The first excerpt is moderately slow (marked Powerful). The second is fast (marked With Intensity). The third excerpt is moderately fast (March Tempo)