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 Forum index » Clavia Nord Modular » G2 Patches - Completed » Synth
8-mode modal synthesis patch
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Chet



Joined: Nov 19, 2004
Posts: 231
Location: Lititz,PA,USA
Audio files: 7
G2 patch files: 35

PostPosted: Sun Aug 28, 2005 8:47 am    Post subject: 8-mode modal synthesis patch Reply with quote  Mark this post and the followings unread

Attached is a patch that does Tassman-style modal synthesis: 8 parallel high-resonance bandpass filters, excited by an input impulse.

The G2 bandpass filters don't seem well-suited for this kind of synthesis: the duration of their ringing resonance is either too short, or continuous. So there's an additional envelope/vca that cuts off the sound when you release a key.

The mod wheel controls the timbre and envelope of the input impulse.

Only the first variation is programmed.


Modal6.pch2
 Description:
8-mode modal synthesis patch

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 Filename:  Modal6.pch2
 Filesize:  3.5 KB
 Downloaded:  961 Time(s)

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eposk



Joined: Apr 29, 2005
Posts: 155
Location: Portland, OR
G2 patch files: 1

PostPosted: Sun Aug 28, 2005 10:02 am    Post subject: Reply with quote  Mark this post and the followings unread

nice patch, has a cool sound to it. fun to play with too!
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mosc
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Joined: Jan 31, 2003
Posts: 17630
Location: Allentown, PA
Audio files: 125
G2 patch files: 60

PostPosted: Sun Aug 28, 2005 11:16 am    Post subject: Reply with quote  Mark this post and the followings unread

This is very cool.

I bet when the 1.4 version with Palle's genetic variation devloper will work very well with a patch such as this.

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eposk



Joined: Apr 29, 2005
Posts: 155
Location: Portland, OR
G2 patch files: 1

PostPosted: Sun Aug 28, 2005 1:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

when is 1.4 coming out? i havent heard any news about it for a while...
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mosc
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Joined: Jan 31, 2003
Posts: 17630
Location: Allentown, PA
Audio files: 125
G2 patch files: 60

PostPosted: Sun Aug 28, 2005 2:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Question
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Rob



Joined: Mar 29, 2004
Posts: 580
Location: The Hague/Netherlands/EC
G2 patch files: 109

PostPosted: Sun Aug 28, 2005 3:46 pm    Post subject: Re: 8-mode modal synthesis patch Reply with quote  Mark this post and the followings unread

Chet wrote:
The G2 bandpass filters don't seem well-suited for this kind of synthesis: the duration of their ringing resonance is either too short, or continuous.


Here is a little trick that gives more precise control over the ringing time of a filter.

How it works:
Internally a 12 dB filter is on the point of self-oscillation and the resonance is damped by feedback of the bandpass output to the input. By using an 'external' resonance feedback path and some scaling it is possible to get more precise control. Note that it is best to set the filter resonance fully open and invert the bandpass output before the feedback. Then it is just a matter of which mixer knob curve to use, and optional extra range scaling, to create the desired 'feel' for a decay knob.


LongFilterRinging.pch2
 Description:
Trick to get precise control over the ringing time of a pulse excited 12dB filter in bandpass mode.

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 Filename:  LongFilterRinging.pch2
 Filesize:  2.17 KB
 Downloaded:  895 Time(s)

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Chet



Joined: Nov 19, 2004
Posts: 231
Location: Lititz,PA,USA
Audio files: 7
G2 patch files: 35

PostPosted: Tue Aug 30, 2005 10:34 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the tip, Filtermeister! Smile

I'll add that to the patch. Looking back on it, there's some other stuff I'd like to add, too.
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Chet



Joined: Nov 19, 2004
Posts: 231
Location: Lititz,PA,USA
Audio files: 7
G2 patch files: 35

PostPosted: Wed Aug 31, 2005 10:55 am    Post subject: Reply with quote  Mark this post and the followings unread

Here's a subsequent version that incorporates Rob's feedback mechanism. It also includes a tuned resonator, similar to the hollow tubes under a set of vibes. The resonator can be turned off via a mixer knob in the 'effects' section.


Modal8.pch2
 Description:
Tassman-style struck bar w/Rob's feedback network and a tuned resonator

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 Filename:  Modal8.pch2
 Filesize:  4.47 KB
 Downloaded:  831 Time(s)

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Chet



Joined: Nov 19, 2004
Posts: 231
Location: Lititz,PA,USA
Audio files: 7
G2 patch files: 35

PostPosted: Wed Aug 31, 2005 6:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yikes, I just found out that I posted the wrong patch. The correct one is here. Embarassed


Modal9.pch2
 Description:
A correction to modal8

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 Filename:  Modal9.pch2
 Filesize:  4.71 KB
 Downloaded:  887 Time(s)

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