Saturday, January 08, 2005

FFT tools vol 1

These plugins are intended to constitute a spectral sound-design toolbox. Most of them are inspired by image processing techniques as you can find in photoshop for example. I've used the FFTReal class by Laurent De Soras that can be downloaded at musicdsp

::WARP::
This plugin swap a frequency band defined between the fmin and fmax parameters while leaving the side bands unchanged. Low frequencies are mapped to high ones and high to low. The resulting sounds are highly inharmonic. You can try to set the min frequency very low (i.e.100Hz) and the max frequency to its maximum thus letting the very low frequencies pass through while swapping the remaining frequencies...

::LEVELS::
This plugin affects the spectral dynamic. It classifies the magnitudes in 3 regions: small, medium and big whose gains can be adjusted independently between [-20dB;+20dB]. Therefore by boosting or cutting the small magnitudes, you can either add liveliness or remove background noise. Just try it to hear how far you can change your sound's character.

::KONTRAST::
This plugin also affects the spectral dynamic. It scales the spectral magnitude histogram according to a transfer function defined by the min, max and center parameters with saturation of the levels below the min and above the max.

::ROBOTIZER::
This one just forces the phase to 0.0 thus removing life from your sound. No parameter except a gain.



downloads:
vst win32
vst osx

Just uncompress them to your plugins directory and have fun ;-)

4 Comments:

At 6:02 AM, Anonymous Anonymous said...

I like the robotizer, but I think i would be really cool if you could control the resulting pitch, say, via incoming midi Note On messages. Do you thing that would be possible to add?

Thanks!

 
At 2:14 AM, Anonymous Anonymous said...

Cool stuff! We need more of these - I think FFT effects are a relatively undeveloped category of processing.

Robotizer: in addition to phase = 0, is it practical to add things like "phase rises with frequency", "phase lessens with frequency", "phase alternates up and down", "phase is randomized"? Beyond practical, are they audible? I suspect that without modulation, the differences may be too subtle to bother over.

Another thought - is it practical to modulate the phase in realtime (too many LFOs? taps on a pseudo-random generator? one LFO with different phases for each?) - this would have to do something to the sound, to modulate each harmonic separately...maybe modulating them in groups?

or (heh heh) what if you modulate the phase with the AUDIO?

 
At 3:28 PM, Anonymous shola said...

Hiya, sorry this is probably a really stupid question, but, I downloaded frea(k)oscope into my cubase vst plug-ins folder but when I go to look at the wave form of my tracks nothing shows up...I've tried using it as a send and also as an insert but it doesn't work. Any advice? Cheers

 
At 7:23 PM, Anonymous Anonymous said...

Hiya,

I can't seem to get the OS X versions of any of the plugins including the Freakoscope. I've put then into the same folder as other VST plugins and Ableton Live doesn't seem to recognise them. Any ideas?

Birju Ravaliya

 

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