Deep Note, THX's distinctive audio logo often heard before movies, is getting an upgrade. The sound's creator, James A. Moorer, first composed it in code in 1982. RATH: Don't get excited.

For some brands, an audio logo is just as important as a visual one. Close your eyes, and you'll know it's an Intel ad from its famous chimes. "I'm Lovin' It" is synonymous with McDonald's.