>I wonder if it's possible to generate a sound stream from video, and what sort of resolution and colour depth could be encoded in to the sound. There was some

>I wonder if it's possible to generate a sound stream from video, and what sort of resolution and colour depth could be encoded in to the sound. There was some work done on this. I don't remember how well it worked. I think this is it: http://www.seeingwithsound.com/sonar.htm http://www.seeingwithsound.com/sonar.htm