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 Forum index » Clavia Nord Modular » Nord Modular G2 Discussion
Loopable enveloppes?
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gauthier



Joined: Sep 19, 2016
Posts: 22
Location: france
G2 patch files: 2

PostPosted: Thu Dec 08, 2016 11:28 pm    Post subject: Loopable enveloppes? Reply with quote  Mark this post and the followings unread

Got myself a G2, there is one feature of the Alesis Andromeda A6 that I really like which is the loopable envelope.

In the A6 you can choose start and end point of the enveloppe loop, using this with ability to change the type of slope and obviously the time of each enveloppe stage, it gets really interesting IMHO.

What are the solutions at hand to reproduce that kind of flexibility with enveloppes in G2?

I guess this would involve several simple enveloppe modules chained in some way, the other concern is how to have start and end point parameters defined by a pair of knobs.
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Blue Hell
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Joined: Apr 03, 2004
Posts: 22201
Location: The Netherlands, Enschede
Audio files: 208
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PostPosted: Fri Dec 09, 2016 2:11 am    Post subject: Reply with quote  Mark this post and the followings unread

I'd try it with the SeqCtr (control sequencer).

You'd drive it with a saw shaped signal. For the start and end points you could compare the saw level to some set levels ...

Hmm ... to change the start point though you would have to change the phase of the saw lfo, LFO B can do that, and then reset the LFO when the end level is reached ..

something like that probably.

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gauthier



Joined: Sep 19, 2016
Posts: 22
Location: france
G2 patch files: 2

PostPosted: Sat Dec 10, 2016 3:49 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Blue Hell, I'm not familiar with this module.

Do you intend to use it to draw the shape of the enveloppe itself? I see that the cross fade button allows to smooth the values which is really useful to remove the stepping.

I'm attaching a test (controlling the pitch) where I use a LevAmp and LevAdd to control length and start, this seems to work somewhat how I intend.

Now my problem is to have the beginning and end of the enveloppe to go on key press (say it should only loop the middle steps in CtrlSeq on sustain, playing the first few ones once and last ones on release), this might prove tricky but maybe achievable, even if I'd need 3 CtrlSeq that would be fine. Any idea for that?


Loopable enveloppe test 1.pch2
 Description:
First attempt at Loopable enveloppe.

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 Filename:  Loopable enveloppe test 1.pch2
 Filesize:  1.3 KB
 Downloaded:  121 Time(s)

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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 205
Location: Kebek
G2 patch files: 30

PostPosted: Sat Dec 10, 2016 7:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi ! Something like this ?


EDIT : for the 'env loop release', its up to you to choose to restart it when you press key or release it.

http://electro-music.com/patchviewer/?URL=/forum/download.php?id=42805


loopable_enveloppe_test_Akuma11.pch2
 Description:
'1 env > key pressed' + '1 env > key release'

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 Filename:  loopable_enveloppe_test_Akuma11.pch2
 Filesize:  2.28 KB
 Downloaded:  119 Time(s)


Last edited by Electromagnetic Wave on Wed Dec 14, 2016 8:10 am; edited 1 time in total
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gauthier



Joined: Sep 19, 2016
Posts: 22
Location: france
G2 patch files: 2

PostPosted: Sun Dec 11, 2016 5:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Electromagnetic Wave, the patch looks great and does the release nicely.

I'll try to complete it with a fixed attack similarly, but would you mind expanding on usage of the logic XNOR, because I'm a bit confused with it, it seems only one input is connected so the other should always be 0.

Also, what are the ADSR enveloppes modules for?
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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 205
Location: Kebek
G2 patch files: 30

PostPosted: Sun Dec 11, 2016 9:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cousin !

XNOR truth table :

00=1
01=0
10=0
11=1

What I need is 00=1 for the release env. I can use a logic inverter module instead of the flip flop module to save few resources (cycles / memory).

I can replace the ADSR envelopes modules by other modules too. I use them to let the signal pass with good action (trig/release) before to go on the mixer > pitch osc input. As you can see the KB button is off. I use the gate signal from the Keyboard module or the logic gate signal from the flip flop module to retrig them. I can disconnect cable from EnvADSR2 and activate the KB button with same result.

My patch is not fully optimised for resource. But I think you got the main idea. Probably we can achieve the same result with many other different solutions.
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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 205
Location: Kebek
G2 patch files: 30

PostPosted: Mon Dec 12, 2016 12:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here is a small update : I replaced the flip flop module by a logic inverter module + a switch to select to restart the 'env release' when the key is release or when a key is pressed.

http://electro-music.com/patchviewer/?URL=/forum/download.php?id=42815


loopable_enveloppe_test_akuma12.pch2
 Description:
small update : replaced the flip flop module by logic inverter module + a switch to restart the 'env release' when the key is released

Download
 Filename:  loopable_enveloppe_test_akuma12.pch2
 Filesize:  2.34 KB
 Downloaded:  156 Time(s)

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