This seems aimed at the audio engineer by day, that dabbles with video and likes to podcast on the weekend.

ENGADGET: Zoom Q2HD Handy Video Recorder lets you stream and record on the move, we go hands-on

He tapped into the internship program, and now he is the most famous audio engineer and stage manager in the business.

FORBES: Internships: The Quickest Way To Gen Y Success

Of course, good sound is subjective, so the app sets a concrete metric: It attempts to replicate exactly what an audio engineer hears inside a recording studio.

WSJ: Studio Sound to Go | App Happy

"There's a huge chance that this is not Zimmerman's voice, " said Primeau, a longtime audio engineer who is listed as an expert in recorded evidence by the American College of Forensic Examiners International.

CNN: STORY HIGHLIGHTS

Rob Byers was the audio engineer.

NPR: Jason Vieaux Picks Out a New Guitar

Soundmatters International, Inc. www.soundmatters.com was founded in 1998 by physicist, former NASA engineer, and audio design legend Dr. Godehard Guenther.

ENGADGET: Soundmatters' $250 Dash 7 portable Bluetooth speaker to debut at CES 2013

Sound engineer Olivier Warusfel spends most days sequestered in an audio cave with a computer.

NPR: IRCAM: The Quiet House Of Sound

In the 1980s Amar Bose, an electrical engineer at the Massachusetts Institute of Technology and founder of the audio company of that name, pulled off this trick for the first time by designing pilots' headphones that reduce the noise of jet engines.

ECONOMIST: Noise-cancelling technology

The Media Systems team is looking for a software quality engineer with a strong technical background to test still, video and audio capture and playback frameworks.

FORBES: Apple Hiring Digital Camera Expert For iPad Group