Sndpeek

Sndpeek is a real-time audio visualization software.

video.avi

Avidemux is a real-time audio visualization software develope by a team in the Princeton Sound Lab. With this software you can actually see the sound you are listening to or the sound you are making. With some keyboard shortcut, you can change the way the pattern look and act. This software is really intresting if you are working with sound and if you want to make it "visible".