Here's a little description from snopes.com:
This display was the work of Carson Williams of Mason, Ohio, who spent about three hours sequencing the 88 Light-O-Rama
channels that control the 16,000 Christmas lights in his 2004 holiday lighting spectacular. The musical accompaniment is
broadcast over a low-power radio station so that it is only audible to visitors tuned in to the correct frquency and doesn't
disturb the neighbors.

You can also go to WonderlandChristmas.com if you're
(insane and) looking for how-to instructions on doing it yourself.