It’s difficult to believe “Pitch Perfect” was scripted by Kay Cannon, a vastly talented writer who made a name for herself working on “30 Rock,” a job that requires ingenuity, a samurai-sword-sharp sense of humor, and a mathematical understanding of screen timing. Cruelly, “Pitch Perfect” is a glorified episode of “Glee” with a “Family Guy” funny bone, bellyflop displays of improvisation, and a running joke concerning projectile vomiting. At one point, a character even slides around in the soupy stomach contents. Yeesh. Perhaps the target demographic of teenagers and music competition nuts will enjoy themselves wholeheartedly with this bothersome feature, losing themselves in the songs and fatigued silliness, yet “Pitch Perfect” is an unexpectedly lazy effort from a genuinely inspired writer, steamrolling through the world of a cappella in an uncivil manner that doesn’t inspire laughs or induce the chills that typically accompany true vocal power. Read the rest at Blu-ray.com