Below is the second movement of John Adams' Grand Pianola Music. Not necessarily a so-called "band" piece (Adams has not written one), Grand Pianola Music is written for winds, two pianos, and three female vocalists. The piece has some absolutely beautiful moments and you should certainly take the time to listen to this piece and Adams's music in general if you are not familiar with it. This piece will be performed on our first concert of the year in September.
Also below is a link of John Adams speaking about pop culture and music. This is certainly an enlightening talk and can give you some more insight into the creative process for one of the most important contemporary composers. If you have a chance, check it out!
Grand Pianola Music, II. On the Dominant Divide
John Adams Dishes on Pop Culture