Smooth apes that we are, we like to be stimulated by outside forces. Live music, especially dance music, is a physical experience. People on stage between and behind the speakers may not realize just how much so, as the very lowest notes don't develop until they are 20-30 feet out in front of the mains. The kick bass and the low notes of the bass guitar resonate in the human chest; other frequencies stimulate other parts of the body. It just helps that groove that gets people moving on the dance floor. There's a reason that suboctave synthesizers were widely adopted--it adds to the frisson we get from the rest of the signal, and why people fill their vehicles with subwoofers. They want to feel the music.

I'll leave it there. There are whole discussions about how different rhythms affect us psychophysiologically. But at heart, it all comes back to putting the boomp in the boompty-boomp-boomp.

"My primary musical instrument is the personal computer."