On Fri, Apr 24, 2015 at 12:44:20PM +0200, anders.vinjar@xxxxxx 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) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
