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 Kyma Forum
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 shifting partials
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| Author | Topic: shifting partials | |
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flo Member |
posted 04 November 2005 05:50
 
Hi, would it be possible to shift the partials of a sound with kyma, in order to make a harmonic sound inharmonic for example (and vice versa)? Would be great if you would be able to control this per partial, also in realtime. Best, IP: Logged | |
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SSC Administrator |
posted 04 November 2005 09:33
Yes, you can do this with the SpectrumModifier Sound. IP: Logged | |
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flo Member |
posted 04 November 2005 13:49
Ah, I had this one in mind too, but because of circumstances I haven't been able to try immediately (laptop-repair). Looking forward to do this. IP: Logged | |
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pete Member |
posted 04 November 2005 17:49
Note single side band ringmod pitch shifts partials and makes there relationship change, so if you ring mod pitch shifted up and used ordinary pitch shift to bring the lowest pitch of interest back to its original pitch you can make a sort of partial spreader module. Note that the single side band ring modulator needs a proper hilbert type 90 deg phase shifter and not the non unity gain one in the prototypes. Pete IP: Logged | |
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flo Member |
posted 11 November 2005 14:52
If you want to be able to do this per partial, you can't avoid to use one modifier per partial, can you? Because only that allows you to independently change the partials. Is the same principle possible via the FFT-way? IP: Logged | |
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SSC Administrator |
posted 13 November 2005 11:49
One possibility is to come up with an expression that modifies each partial differently. By making the modification dependent on TrackNumber, you can use a single SpectrumModifier to modify each partial in a different way. For example, in the FreqScale field, put the expression: TrackNumber / 32 This scales the lower partials to a fraction of their original frequencies. The 32nd partial pass through unscaled. Partials higher than 32 would also be unscaled since the range of the FreqScale parameter is (0,1). IP: Logged | |
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SSC Administrator |
posted 13 November 2005 14:56
This one is also very cool! (copy paste into the FreqScale field of SpectrumModifier) {(1 to: 256) collect: [ :i | !Warp suffix2: i]} at: (TrackNumber min: 32) Gives you 32 faders scaling frequencies of 1st 32 partials. IP: Logged | |
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flo Member |
posted 16 November 2005 02:26
In other words: you can scale the amplitude of those partials individually with faders? (or change the freqs of those partials?) IP: Logged | |
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SSC Administrator |
posted 16 November 2005 08:33
Frequencies (if you paste that into the FreqScale field) and/or Amplitudes if you paste it into the AmpScale field) IP: Logged | |
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flo Member |
posted 16 November 2005 14:09
ok, sorry if I'm a little-bit redundant, but at the moment I'm not able to have feedback from the practice directly... Is it possible to do something comparable the FFT-way? IP: Logged | |
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KX Member |
posted 22 November 2005 03:49
quote: Indeed this one is very cool! [This message has been edited by KX (edited 22 November 2005).] IP: Logged | |
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SSC Administrator |
posted 22 November 2005 08:47
You could multiply the result of the entire expression by your scale factor: ({(1 to: 256) collect: [ :i | !Warp suffix2: i]} at: (TrackNumber min: 32)) * !Scale Or you could select all of the !Warp faders in the VCS editor and change their ranges there. IP: Logged | |
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flo Member |
posted 24 November 2005 04:37
thanks for this tip. Because I first tried all the new techniques in the spectral domain, it took me some time to try to implement this idea. I`m not sure I implemented the 'proper hilbert type 90 deg phase shift' (what a beautiful term btw) in the right way. Would you mind to take a look at the example in my attachment? Best, florian IP: Logged |
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