The Onion, "America's Finest News Source," reports that Activision only sold 52 copies of this sequel to Guitar Hero nationwide in its first week of availability:

Sousaphone Hero offers two dozen public-domain marches, including 1893's "The Liberty Bell," 1896's "Stars and Stripes Forever," and 1897's "Entry of the Gladiators." The bulky sousaphone-shaped controller coils around the body, and players wear white spat-like foot coverings fitted with sensors that monitor synchronized marching steps. As with the fret buttons on Guitar Hero's guitar peripheral, the sousaphone controller's three valves are color-coded to match on-screen notes the player must hit.

So don't count on weekends with your Xbox 360 and Sousaphone Hero to get in shape for homecoming!