|Author||Topic: Spectral Inverter vst plugin please.......|
Posted: 11th April 2002 20:02
Posted: 13th April 2002 20:19
What do you mean by spectral inverting, data? If it is reversing the order of spectral components, i.e. putting high parts of the spectrum into low frequencies, and vice versa, a simple ring modulator with fmod=20kHz makes the trick.
Posted: 13th April 2002 21:41
Have you had a look at Prosoniq Pi-Warp? That might do what you want.
Posted: 13th April 2002 22:25
There is Spectral Mirror in the SoundTransformer plugin pack, but those are only available for Mac. Anyway, it's not quite so great because it inverts frequencies linearly rather than logarithmicly, so you get loads of high frequencies (basically everything below the highest octave moves into the highest octave) & very little else.
A few years ago, I wrote a Csound opcode that does spectral inversion logarithmically. It's basically just a modified version of pvadd. I've only rebuilt Csound for Mac, but I would gladly send you the source file if you know how to compile Csound for yourself. I would consider turning the effect into a VST plugin if I actually understood 10% of the phase vocoder analysis code involved, & if I thought that I could make it run anywhere close to realtime...
Posted: 15th April 2002 18:27
A Logorithmic Spectral inverter sounds cool. I don't like CSound though, someone really needs to re-write that prog, it's well out of date.
Isn't Pi-warp just some kind of frequency shifter with a built in LPF and reverb?
Posted: 15th April 2002 21:53
Yeah, I agree about Csound, I never use it anymore, even as much as I love my spectral inverter & have no other way of doing it... In fact, the phase vocoder analysis is a good example of how out of date Csound is. It's completely impossible to use any of the pvoc opcodes in realtime because you have to record an audio file, run it through the pvoc analyzer & render an analysis file, & then work with that analysis file in Csound. Yuck...
Posted: 15th April 2002 21:54
quote:Ah, forgot to mention though that someone basically has made an up to date Csound of sorts. It's called SuperCollider & it's completely amazing.
Posted: 15th April 2002 22:08
there is csoundAV(new version of realtime csound)
I believe it has pvoc and the newer streaming pvoc opcodes(i have no idea what the difference is)
Also richard dobson has made a realtime pvoc vst plugin
I dont think they are really that interesting though. I think part of the problem is these processes dont seem to lend themselves well to a plugin. To me the interesting stuff comes from time varying parameteres which is rather hard to do with midi cc data. If the plug had absynth style envelopes that might be a different story but that would take some serious cpu cycles.
Posted: 16th April 2002 02:15
is this what you mean ?
Posted: 16th April 2002 06:20
Just to point out that a preliminary version of a VSTi version of CSound is available, as is one which will work as within MAX.
Although I'd most want to see it integrated into an audio editor for interesting sound-mangling.
Posted: 16th April 2002 17:26
Arrghh! That Vspectshift is nasty! They're right -logorithmic would be more musical (not to mention usuable!).
I'm aware of Supercollider. In fact, I went to a seminar on it once and I agree, it does look amazing. Unfortunately, it is for Mac users only
Max/MSP would also be a viable option and less time-consumeing, but it's taking an eternity for Cycling74 to release a PC version. I doubt I'll ever see it come to light in my lifetime
Posted: 16th April 2002 18:18
how sbout this one
[ 16 April 2002, 21:22: Message edited by: realmarco ]