Are you thinking of something
$1According to them:
> The vOICe implements a form of sensory substitution where the goal is to bind visual input to visual qualia with a minimum of training time and effort, and improve quality of life (QoL) for blind users.
I've never tried it myself, because it just seems like a horrifying compilation of jargon, hype, and buzzword bingo. And the software is oddball and slightly unfriendly, just like the website. Uh, OK, looks like this explanation from the download page (Why is it on the download page, and not the front page or the about page?) is somewhat more coherent:
> How does it work? There are three simple rules in the general image to sound mapping of greyscale camera images, each rule dealing with one fundamental aspect of vision: rule 1 concerns left and right, rule 2 concerns up and down, and rule 3 concerns dark and light. The actual rules of the game are
>
> Left and Right.
>
> Video is sounded in a left to right scanning order, by default at a rate of one image snapshot per second. You will hear the stereo sound pan from left to right correspondingly. Hearing some sound on your left or right thus means having a corresponding visual pattern on your left or right, respectively.
>
> Up and Down.
>
> During every scan, pitch means elevation: the higher the pitch, the higher the position of the visual pattern. Consequently, if the pitch goes up or down, you have a rising or falling visual pattern, respectively.
>
> Dark and Light.
>
> Loudness means brightness: the louder the brighter. Consequently, silence means black, and a loud sound means white, and anything in between is a shade of grey.