Oliver Wang

About 10 years ago, a disgruntled pianist in Los Angeles named John Wood began a popular bumper sticker campaign with the slogan, "Drum Machines Have No Soul." Not everyone was convinced, including producer Eric Sadler.

"Drum machines don't run themselves," Sadler says. "It's the people who put into the drum machines that give the drum machines soul, to me. I've definitely given some drum machines some soul."