Inverting frequency content

Questions and discussion about building and using Max for Live devices
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Posts: 99
Joined: Thu Apr 28, 2005 12:19 am
Location: Los Angeles, CA

Inverting frequency content

Post by eric_c » Fri Jan 18, 2013 4:04 am

Is it possible to create a Max for Live device that would take the audio of a track and invert the content of the frequency spectrum? Think of viewing the sound on a spectrogram, and then being able to flip the image vertically, like this:


Does that make sense? Would it sound interesting? I've never messed with Max but I'd be interested in trying this out as a first project if its doable.

Posts: 116
Joined: Mon Apr 27, 2009 3:34 pm

Re: Inverting frequency content

Post by zlatko » Mon Feb 11, 2013 10:27 pm

FFT can do that, a basic inversion does not sound much, especially if you don't deal with the phase spectrum then it is likely to sound like a bunch of short soft sinewaves, like a bad mp3, inverting specific regions should be more fun, a proper phase vocoder with oscillator bank resynthesis might be the best....
Who else has been sick of 4/4 for the last 10 years ??

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