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 Forum index » Clavia Nord Modular » G2 Patches - Completed » Synth
Additive synth
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Tim Kleinert



Joined: Mar 12, 2004
Posts: 1140
Location: Zürich, Switzerland
Audio files: 7
G2 patch files: 236

PostPosted: Tue Mar 01, 2005 6:58 am    Post subject: Additive synth Reply with quote  Mark this post and the followings unread

Additive synthesis is elusive. Although it is very simple to understand, it isn’t that easy to implement.

Of course, the most obvious way is to equip each partial with ist own loudness envelope. But although comprehensive, this method is rather uninviting for intuitive use.

The crux therefore is to arrive at a macrostructural parametrisation which is effective while still being practical in use.

The attached patch is an attempt at this. It’s a 16-partial additive synth using the following parameters:

Position, Scape, Depth: Imagine the partial levels being horizontally aligned from left to right –just like a graphic EQ or meter bridge. Now, imagine being able to introduce „peaks and valleys“ into this horizontal graph, boosting some partials while drowning out others. That’s exactly what these parameters do.
The Scape parameter determines how close these „peaks and valleys“ are (and therefore also how many of them there are, as they spread over the 16 partials). The more you raise the Scape parameter, the closer the hills and valleys move together.
Depth controls the steepness of this scape –the more this parameter is increased, the greater the difference between peaks and valleys become. (Obviously, when Depth is zero, the Scape parameter has no effect.) This is a bipolar parameter, enabling the inversion of the scape.
Position finally controls the position of the fundamental partial in this scape –an offset, so to speak. This parameter wraps around many times.

Base: The base level, to which the scape is added. This is a bipolar parameter, enabling the „drowing out“ of the scape, so that only the highest „peak“ partials are audible.

Slant: this bipolar parameter finally introduces a slant into our scape, allowing to „tilt“ the partial spectrum towards the high or low partials respectively.

All these parameters are represented by multi-stage envelopes, enabling some interesting timbral motions.

Additional features are: toggling between even and odd partials via morph group 8 (attention: values 0-126 = even, 127=odd; this is „odd“ indeed but that’s Clavia for ya…), a nice chorus-delay, and the customary beloved reverb module.

7 variations, ready to play. Variation 8 is an init patch.

The variations are just some fast tweaks. It will take me some more time to fully explore the potential of this approach. I hope you feel invited to explore, too.

Have fun.

tim

Disclaimer: owners of unexpanded G2s, beware! This is a DSP-hungry patch. Sorry...


AdditiveSynth TK.pch2
 Description:
16-partial additive synthesizer with nifty macrostructure

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 Filename:  AdditiveSynth TK.pch2
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Rix



Joined: Aug 08, 2004
Posts: 82
Location: Breda, the Netherlands
Audio files: 2
G2 patch files: 25

PostPosted: Tue Mar 01, 2005 12:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

Excellent Idea !
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cebec



Joined: Apr 19, 2004
Posts: 1079
Location: Virginia
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PostPosted: Tue Mar 01, 2005 4:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

wow, this is really nice! i love it! Exclamation
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Wan



Joined: Mar 31, 2004
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Location: Netherlands, Ugchelen
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PostPosted: Wed Mar 02, 2005 1:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Very smart design Exclamation

Esp. the trick with the wavewrappers is nice.

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mother misty



Joined: May 13, 2004
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Location: Ghent / Belgium
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PostPosted: Wed Mar 02, 2005 2:17 am    Post subject: Reply with quote  Mark this post and the followings unread

coooool one soshin! thumb up
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mosc
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Joined: Jan 31, 2003
Posts: 17834
Location: Allentown, PA
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G2 patch files: 60

PostPosted: Wed Mar 02, 2005 9:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Wow, you are really onto something here. This make some very beautiful sounds. Very expressive playing. Even though you have "simplified" additive synthesis with these new parameters, it's not intuitive how these work. I'll have to spend some time with this, but it's worth it.

I'm no expert on this kind of synthesis, but it seems to me that this is pretty significant work in the field. My take on this is that you have not just posted another G2 patch, but you've taken a serious step in developing the art of synthesis. Congratulations.

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my music and other stuff
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Tim Kleinert



Joined: Mar 12, 2004
Posts: 1140
Location: Zürich, Switzerland
Audio files: 7
G2 patch files: 236

PostPosted: Wed Mar 02, 2005 11:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Wow -thanks for the enthusiasm, folks. Glad you like it.

Yes, Howard, I know what you mean by "not intuitive". It takes some imagination to really understand what these abstracted parameters really do. That's why I made a point of explaining them in the initial post. I think the "graphic equalizer with hills and valleys" visual analogy is helpful to grasp what's actually going on.

Ironically, additive synthesis never interested me in the slightest up to now. But browsing though some threads pertaining FFT, I suddenly had this idea of building a synth that would be able to impose a time-variant function onto the volumes of a bank of partials. Experiments with CtrlSeq lookup tables didn't work out since they don't wrap around (and building modulo functions for a comprehensive number of partials is promptly sabotaged by the mem% bottleneck). Also, I personally am a lazy person, and am put off by having to tweak multiple lookup tables when experimenting. So I opted for the wavewrapper module, which provided the core idea: the "Scape" function.

I wish I had the time right now to dive into this model and come up with some better variations, as I believe there are some gold mines hidden in there. But this week is filled up with tour rehearsals, and the weekend with the first gigs. Oh well...

But I already have some new ideas in this vein... we see...

cheers to all,
tim
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Roland Kuit



Joined: Sep 29, 2003
Posts: 1091
Location: The Netherlands/Sweden
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PostPosted: Wed Mar 02, 2005 12:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

Beauty, thanx!
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mosc
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Joined: Jan 31, 2003
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PostPosted: Wed Mar 02, 2005 12:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

Tim, I'm so happy you came back to us... love
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Tim Kleinert



Joined: Mar 12, 2004
Posts: 1140
Location: Zürich, Switzerland
Audio files: 7
G2 patch files: 236

PostPosted: Thu Mar 03, 2005 1:08 am    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
Tim, I'm so happy you came back to us... love


Laughing ... yeah, I'm happy I'm back too.

Interestingly, now I'm loving the G2 more than ever! It's my dream machine.

I made the common mistake of blaming my lack of skill on the tool rather than myself. The "coldness of sound", which the G2 is often accused of, is just a neutralness, IMO. And if you think about it, that's actually the way it should be for a modular system. Creating the "character" should be the responsibility of the user.

Anyway -I'm already onto some new ideas along the "additive route". Dunno yet if they will work out, but I'll let ya know.

cheers,
tim
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jofb



Joined: Jun 01, 2005
Posts: 6
Location: porto portugal
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PostPosted: Wed Jun 01, 2005 3:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

sounds great! thumleft thanks for sharing i have not seen anyting like it before Shocked it will take some time to understand but i´m having fun already banana
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why not taste some portuguese wine along with modular synthesis?
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dahwoud



Joined: Jul 09, 2005
Posts: 4
Location: dahwoud
G2 patch files: 1

PostPosted: Mon Jul 18, 2005 4:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

Shocked Simply awesome ... really intuitive additive synthesis approch ... For me, the best G2 patch ... not an other 303 like. This is a way G2 have to go ... your patch remember me kind of beauty coming from my beloved K5000R rack Very Happy ... Additive synthesis under rated ... Razz

Guy respect, your rock !!
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monokit



Joined: Apr 14, 2004
Posts: 102
Location: Netherlands
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PostPosted: Tue Jul 19, 2005 4:26 am    Post subject: Reply with quote  Mark this post and the followings unread

Not owning the hardware yet, I'd love to hear an mp3 of this one!
Please? Wink
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taylor12k



Joined: May 04, 2005
Posts: 56
Location: brooklyn

PostPosted: Fri Jul 22, 2005 3:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

i highly recommend anyone interested in additive synthesis to take a long, serious look at Virsyn's CUBE 2 software synth.

it's been my favorite soft syntth since the day i bought it... absolutely beautiful.. if you're into additive..

virsyn.com

and harry, the guy who makes it, is quite friendly and responsive to questios..
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dahwoud



Joined: Jul 09, 2005
Posts: 4
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PostPosted: Tue Jul 26, 2005 9:27 am    Post subject: Reply with quote  Mark this post and the followings unread

Factory K5000R/S demos ...

click here
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