[LAU] Create A Negative of the sound

[anders.vinjar at bek.no]

    S> Hi, Is there any software that can create a negative of the
    S> sound? I'm thinking of taking an arbitrary frequency bandwith,
    S> pick a center and invert it, so that bass becomes high, and high
    S> becomes bass?

This is a standard phase-vocoder trick.  You'll find examples showing
this in many common dsp-packages, eg. CLM, SC3, Csound etc.

Cheers,

-anders