Can you help me recall a piece of music?

Here’s what I remember:

• It would probably fall under the “classical” umbrella, but only if you opened it very, very wide.
• The composer is definitely a man and an American, and I’m pretty certain it was a 20th-century composition (or possibly late 19th).
• My memory indicates that it was by Aaron Copland or Charles Ives, but I can’t find a title in their lists of compositions that sounds like it would be what I remember. If not, then I’d say it was by someone who’d most likely be grouped with them in terms of period and type of music.
• To the best of my knowledge, I’ve heard this piece performed live only once, most likely in the early 1970s, by a Harvard orchestra or band, guest-conducted by Peter Schickele, and I think it was held in Memorial Hall; at any rate, it was definitely on the Harvard Campus.
• The main thing about it was that it was meant to sound like a small-town band, and the composition itself incorporated deliberate mistakes to lend authenticity to the sound. I thought it was brave of the composer to do that and even braver for a nonprofessional ensemble to play it in public.