Re: [LAU] Create A Negative of the sound

On Fri, Apr 24, 2015 at 12:44:20PM +0200, anders.vinjar@email-addr-hidden wrote:

> 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.

It was even done in the analog days, using techniques similar
to single side band modulation, and used as a primitive form
of voice encryption.

Ciao,

-- 
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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