Hello, I am just starting to get into jazz music, and I am planning on trying out for my school's jazz band this year. I was wondering if you could help me choose a jazz piece that is best played unaccompanied, for my audition. Difficulty is not a problem.

Thanks for your help.
^ Wow, I was going to post this exact same thing. I'm going to try out for my school's j.band too
This is just unacceptable:
a walking bass always sounds good to me, try googling for 'walking bass chords' should get you a hit or two.