Adults have always sounded different to young people, but no one has captured what that sound actually is. Well, no one except for the people who brought the "Peanuts" comic strip to life. While specials like "A Charlie Brown Christmas" didn't require any adults, subsequent ones like "You're in Love, Charlie Brown" called for a teacher, Miss Othmar. Creators were faced with the challenge of portraying a grown-up in a kid's world.

Television producer Lee Mendelson, animator Bill Melendez and "Peanuts" creator Charles Schultz decided not to show the adults, Mendelson recently told Mashable. "So I asked our music director, Vince Guaraldi, ‘Would there be some instrument we could use as a sound to emulate what an adult might sound like to a kid?’” Mendelson said. The trombone was the first instrument they tried and the perfect fit. Wah. Wah. Wah.

We'd say the rest is history, but with the first-ever CGI-animated "The Peanuts Movie" premiering November 6, this sound is far from a thing of the past. If you need proof that they will continue portraying adults in their true trombone form, look no further than "The Wah Wah Machine."

This promotional site allows you to type or record your voice, and generate it into Wah Wah and share it, in case you want to feel all grown up. I plugged the previous sentence in and got this:

BRB, I'm gonna go prank my mom with it.

H/T Twitter