You like music, right? And laughing? I’m assuming you do since, you know, you’re human. And if that’s true, you’re probably going to like “Pitch Perfect” — in theaters Oct. 5 — and the book based on the real world of a cappella. In that vein, I have an exciting prize pack up for grabs this week: goodies to celebrate the opening of “Pitch Perfect”!

Here’s what the book — and movie — are all about:

Get ready to be pitch slapped.

The roots of unaccompanied vocal music stretch all the way back to Gregorian chants of the Middle Ages, and collegiate a cappella is over a century old. But what was once largely an Ivy League phenomenon has, in the past twenty years, exploded. And it’s not what you think. Though the blue blazers and khakis may remain, a cappella groups at colleges across the country have become downright funky.

In Pitch Perfect, journalist Mickey Rapkin follows a season in a cappella through all its twists and turns, covering the breathtaking displays of vocal talent, the groupies (yes, there are a cappella groupies), the rock-star partying, and all the bitter rivalries. Rapkin brings you into the world of collegiate a cappella characters — from movie-star looks and celebrity-size egos to a troubled new singer with the megawatt voice. Including encounters with a cappella alums like John Legend and Diane Sawyer and fans from Prince to presidents, Rapkin shows that a cappella isn’t for the faint of heart — or lungs.

Sure to strike a chord with fans of “Glee” and “The Sing-Off,” this raucous story of a cappella rock stars shows that sometimes, to get that perfect harmony, you have to embrace a little discord.

Here’s what I have for two fine readers, courtesy of Universal Pictures:

• A copy of the book Pitch Perfect: The Quest for Collegiate A Cappella Glory (movie tie-in edition)
• “Pitch Perfect” T-shirt
• Aca-Awesome Magnetic Poetry
• Plus ear buds, sunglasses, pen and Post-It notes

Giveaway is open to U.S. residents only (sorry, international friends), and you can enter by filling out this form before 12 p.m. EST on Friday, Sept. 28. One entry per person. Two winners will be randomly selected via Random.org and emailed for their mailing addresses.

For more about the film, check out the official website, like on Facebook, follow @PitchPerfect on Twitter or see the trailer below. Remember to keep an eye out for the film, opening everywhere Oct. 5!

EDIT on Sept. 28: Congrats to Jennifer and Geza, our winners! I’ll be emailing you both shortly.