You push the first valve down...

...the music goes round and round and comes out random...

Pete Townshend - Girl From The North Country
The Lovin' Spoonful - Me About You
Patty Griffin - The Best Is Yet To Come
Justin Townes Earle - Your Biscuits Are Big Enough For Me
Whiskeytown - 16 Days
Tim O'Brien - You Are My Flower
Kris Kristofferson - The Taker
Johnny Winter - You'll Be The Death Of Me
Uncle Dave Macon - Farm Relief
Neil Young - Sugar Mountain