Spectrographs...

[RDR]

yeah i still struggle a little with their application, mainly because i do everything by ear, i know how a good mix sounds, but yeah good question

bloody awful answer though

try here for a humorous look at spectrograph imaging...

http://www.bastwood.com/aphex.php

try here as well. obvious but interesting

http://en.wikipedia.org/wiki/Spectrogram

Fruityloops has an applet that lets you change visual images into audio sounds, its fun and wierd!!!!

[p_brane]

great link that first one, mad stuff