Windowed sync , fake resonance

[gentleclockdivider]

I am having too much fun creating windowed sync stuff in reaktor , mimicking a resonant low pass filter ,
Could you tell it 's not a filter ?

Sound example
https://app.box.com/file/721814743584?s ... tccwi12e3m
And in a musical context
https://app.box.com/s/b2to4bp2ckmywsbu1yyvwcc6kusfp6x1
Pad is tranzistow , and reso bass is reaktor fake reso bass

[yul]

Pretty neat. What exactly is the working behind the scenes? I saw your post on GS but not sure how this sync can get you such filtered sounds. Should be able to do this elsewhere no?

[gentleclockdivider]

The concept is verry easy , and there is no filtering going on , the high pass filter at the output set to -33(exp) is just to eliminate a tiny bit of dc offset ( around +/-2 hz ), I do this in almost all my reaktor ensembles.
The sine oscillator ( osc B ) frequency is synced to the master osc A ( which can either be saw ,triangle or any other waveform, this defines the windowing function ) ,and osc B amplitude is also modulated by the master osc a , and this it responsible for the windowing function , the output of both is then either squared or cubed ( or abith of both )
Applying a pitch envelope to osc B ( the sineosc ) simulates the resonant peaks/harmonics in a sweeping filter , while in reality it is pitch shifting,sweeping the sine osc
Here's a good explanation about the casio resonance waveforms ( mind you that this part of the cz series is NOT phase distortion)
Under simulating a resonant filter
https://en.wikipedia.org/wiki/Phase_dis ... _synthesis
The nicest part of this windowed sync stuff is those fake ear piercing resonant peaks , look mum no filter

I tried to do i itranzistow (which I love to bits ) but I couldn't get a clean result , same in supercollider ( still learning it ) , but supercollider has a built in formant osc whcih roughly does the same thing


Edit , bazille uses the same method for it's spectral part , and Talmod can do it also
Set osc 1 volume to zero and set to sine and enable sync ,rout subosc to volume input of osc 1 and set to +1 or +2 , or -1 ,-2 when subosc is set to saw
Subosc volume should be set to zero ( not heard at aoutput) , subosc is the windowing function and the master sync , so either choose saw or triangle
Now route an envelope to osc 1 frequency to mimick a sweeping resonant filter , same can be done in any other modular synth
Here's talmod in actin , no filter used
https://app.box.com/s/qo2ij51r7jrci5lo925gzfxznweq5icx

[Dalle]

Nice, I’ve always found windowed sync / formant shift type of sounds interesting, more synths should explore this imo.

[Teksonik]

So that is the sound all the fuss was about?

Why bother with windowed sync when a filter can do the job? There are features and then there are features that have a truly practical application in every synth. I understand the joys of synthesis but these days I just focus on the end sound instead of what I used to get there.

Kepler P6

Here's the Dune 3 patch I made in 2018. Just adjust the Filter(s) to taste. I overdid it with the resonance on the second half of the audio because I know you like that "annoy the neighborhood dogs" filter squelch.

Kepler P6 Tek.zip

Anyway I'm under the weather today so I'm going back to bed..........

[Chris-S]

That would have been a great addition for pure FM synths (which are very weak in faking filter resonance).
But I guess the DX7 developers didn't know this trick.

[gentleclockdivider]

That would have been a great addition for pure FM synths (which are very weak in faking filter resonance).
But I guess the DX7 developers didn't know this trick.

Yeah filter resonance is prett difficult to achieve with fm synthesis but I can get more or less in the same ballpark , but I don't think that was the main goal for fm synthesis .
Trick is to use a stack of 3 operators , use the first operator with high gain ouput , the middle operator to scale it and a high ratio ,and the last operator to the same ratio as the first , doesn't really sound like filter reso but I like the sound .
Casio used the windowing sync trick for the resonant waveforms in their Phase distortion synths , all the rest is phase distortion except reso waves .

Besides , I have tg77 which has filters

[Markus Krause]

That would have been a great addition for pure FM synths (which are very weak in faking filter resonance).
But I guess the DX7 developers didn't know this trick.

Tone2 Nemesis is a pure digital synth built around FM synthesis. It has no 'analog' filter, but it offers 'fake resonance' that can be combined with FM or PM or Waveshaping:
Reso Soft, Reso Hard, Reso Hollow.
The thing that makes this feature interesting it that you can not only resonate sine waves to create an 'analog filter' sound, but any waveform.

Icarus2 also offers fake-synced-resonance, which can be combined with wavetables or anything else:
Sync Saw and Sync Square