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 Forum index » Clavia Nord Modular » Nord Modular G2 Discussion
ScalaG2
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seanwayland



Joined: Jan 29, 2007
Posts: 12
Location: new york
G2 patch files: 1

PostPosted: Tue Apr 01, 2008 8:58 pm    Post subject: keyboard mapping
Subject description: remap midi notes of keyboard
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Hi there all ,
I want to remap the notes of my G2 . Ideally I could save different "scales" as patches and change between them. I can do it with " midi patchbay" , but it is crude and requires me to bring my computer to the gig . It would be great to do it on the nord . I installed the "scala" and was impressed. Excellent work . I dont really want to detune each note microtonally . I want to want notes " all over the place " to my specification .

"
I was just informed by Manuel Op De Coul, the author of Scala, that there is another type of Scala file, ".kbm", which specifies the keyboard mapping. This helps explain why the .scl files do not specify a mapping at all. My G2X keyboard doesn't even go below MIDI Note Number 12 (C which is 4 octaves below middle C), unless I am mistaken. Perhaps modifying scalaG2.py to take a .kbm file as an argument might address the usability vs. resource issue? Then we can avoid the problem of resources being unnecessarily wasted on the tuning block. As always, thank you for your efforts! "

This is posted below . Ideally I would like to be able to convert a midi file ( with my scale ) to be played over the entire keyboard . Please reply thanks .
www.seanwayland.com
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ian-s



Joined: Apr 01, 2004
Posts: 2574
Location: Auckland, New Zealand
Audio files: 42
G2 patch files: 608

PostPosted: Tue Apr 01, 2008 9:47 pm    Post subject: Re: keyboard mapping
Subject description: remap midi notes of keyboard
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seanwayland wrote:
I dont really want to detune each note microtonally . I want notes " all over the place" to my specification.


So you want equal tempered notes in an arbitrary order? Like C3-C5 mapped to C5-C3 descending for example.

I think that could be patched into one slot as a midi note translator, like with the attached prf.


remapdemo.prf2
 Description:

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 Filename:  remapdemo.prf2
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sean wayland



Joined: Mar 30, 2008
Posts: 8
Location: new york
G2 patch files: 3

PostPosted: Wed Apr 02, 2008 3:58 pm    Post subject: g2 note reassign Reply with quote  Mark this post and the followings unread

thanks ian ,
I will look into it . I am Australian. What's with the wonbat ? Where's the kiwi ?
sean
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sean wayland



Joined: Mar 30, 2008
Posts: 8
Location: new york
G2 patch files: 3

PostPosted: Wed Apr 02, 2008 4:55 pm    Post subject: thanks
Subject description: G2
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its working ,
thanks a bunch Ian ....
www.seanwayland.com
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ian-s



Joined: Apr 01, 2004
Posts: 2574
Location: Auckland, New Zealand
Audio files: 42
G2 patch files: 608

PostPosted: Wed Apr 02, 2008 5:12 pm    Post subject: Re: g2 note reassign Reply with quote  Mark this post and the followings unread

sean wayland wrote:
thanks ian ,
I will look into it . I am Australian. What's with the wonbat ? Where's the kiwi ?
sean


I like wombats, such noble beasts. Very Happy
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TEMAS



Joined: Mar 20, 2007
Posts: 54
Location: London
G2 patch files: 3

PostPosted: Wed Dec 03, 2008 8:56 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi.

I've been trying to create a G2 patch file that will play a scala tuning file in the hope that I can play scales on the G2 with unusual tuning, but I am having no luck in trying to make it work. Here's what I have tried:

The G2SCL.pch2, scalaG2.py and nm2g2.py files are inside the G2ools-1.5 folder, which is located in the Applications folder of my Macintosh HD.

If the scala file I'm trying to convert is called "Test.scl" and I open a Terminal window and type:

./scalaG2.py Test.scl

I get the response:

No such file or directory

I've never used Python files or Scala files or even the Terminal window for that matter, so this is all quite complex to me.

Can anyone help with this?
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TEMAS



Joined: Mar 20, 2007
Posts: 54
Location: London
G2 patch files: 3

PostPosted: Wed Dec 03, 2008 10:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Ok, not to worry (for now). I think I've worked it out and appear to have converted my first file. Haven't tried it on the Nord yet.

The problem was that I hadn't located the g2ools-1.5 folder from the Terminal window. Once I was in the folder I typed the same command prompt and a new .pch2 file was made created.
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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 79
Location: Kebek
G2 patch files: 12

PostPosted: Mon Sep 02, 2013 11:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi!

I try this too with no luck. This is what I do:

-windows XP PRO x84
-python-3.3.2
-g2ools-1.5


1. put the "scalaG2.py", "G2SCL.pch2", and "pythagorean.scl" in the g2ools-1.5 folder
2. open a shell (cmd)
3. located the g2ools-1.5 folder from the Terminal windows (cd C:\.....)
4. in the shell I write : scalaG2.py pythagorean.scl

After, I got this message :

"File "F:\...\G2\g2ools-1.5\scalaG2.py", line 62
print head
^
SyntaxError: invalid syntax"



Is it because I use python-3.3.2 ?


Thanks you for your help
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Blue Hell
Site Admin


Joined: Apr 03, 2004
Posts: 20476
Location: The Netherlands, Enschede
Audio files: 147
G2 patch files: 318

PostPosted: Tue Sep 03, 2013 9:13 am    Post subject: Reply with quote  Mark this post and the followings unread

Electromagnetic Wave wrote:
Is it because I use python-3.3.2 ?


Likely so - the tools started their life on some version 2 Python.

2.5 IIRC.

Anyway, seem similar issues using python 3 where 2 was expected.

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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 79
Location: Kebek
G2 patch files: 12

PostPosted: Wed Sep 04, 2013 1:49 am    Post subject: Reply with quote  Mark this post and the followings unread

YES! I'ts work with python v2.7.5 ! But not with v2.2.3


pythagorean.pch2
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 Filename:  pythagorean.pch2
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Blue Hell
Site Admin


Joined: Apr 03, 2004
Posts: 20476
Location: The Netherlands, Enschede
Audio files: 147
G2 patch files: 318

PostPosted: Wed Sep 04, 2013 1:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Great :-)
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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 79
Location: Kebek
G2 patch files: 12

PostPosted: Sat Sep 07, 2013 7:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

Can I use the Scala G2 tool patch (.phc2) for interbus slot patching ? Control the pitch on a synth to another slot ?

Not working with a "NoteSend" module linked to another slot. I tried this too :

Slot1
The output cable from the Mix1-1A1 in a new "2 outputs" module (Left In) and the gate from the "Keyboard1" module in the "2 outputs" module (Right In). I select BUS 3/4 on the "2 outputs" module.

Slot2
On the synth slot I create a new "2 Inputs" module. Select Bus 3/4. Left side go to "pitch oscilator in" and right side go to the envelope AMP gate.

The pitch move like a lfo or legato mode when I play keyboard. Can I have to convert the signal before to connect it in the OSC pitch input ?


EDIT : I cleaned the patch above to make it clear. I just need a tip to dig to understand the problem. Is it an issue about interslot (DSP) latency that I can fix with a delay? Or an issue about the amplitude from the signal ?


scala11.JPG
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slot A
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 Viewed:  100 Time(s)
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scala11.JPG



synth11.JPG
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slot B
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synth11.JPG



ScalaInterslot12.prf2
 Description:
Attempts to use a scala (microtuning) patch on another slot

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 Filename:  ScalaInterslot12.prf2
 Filesize:  7.48 KB
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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 79
Location: Kebek
G2 patch files: 12

PostPosted: Wed Jan 08, 2014 5:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

It seems that my problem is related to the polyphony. Because everything work fine in mono.

I want to understand something else. How to increase the resolution :

Quote:
The tuning resolution at this point is 0.7874 cents, or 1 semitone / 128. The program could adaptively increase the resolution depending on the requirements of the scale. For example, all the 12 tone scales seem to only require 1 bit for the coarse frequency so these could get 0.01220 cent accuracy if required.

http://www.electro-music.com/forum/post-113571.html#113571

Quote:
In practice the internal frequency resolution of the G2 is 0.0057 Hz..

http://rhordijk.home.xs4all.nl/G2Pages/Signallevels.htm#Signallevels_5319_999210


I made several attempts without success.
-I hadded a "level amplifier" after the "Mixer 1-1A" to reduce the signal.
-I added a third row of "SeqCtr" modules and I replaced the "Mix 1-1A" for a "Mix 2-1A" to mix the signal.
-I tried to divide the output signal from the "Mix 1-1A".

Happy new year everyone!!!
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varice



Joined: Dec 29, 2004
Posts: 719
Location: Northeastern shore of Toledo Bend
Audio files: 22
G2 patch files: 49

PostPosted: Thu Jan 09, 2014 2:49 am    Post subject: Reply with quote  Mark this post and the followings unread

Electromagnetic Wave wrote:
Happy new year everyone!!!

Happy New Year!!!

Electromagnetic Wave wrote:
Can I use the Scala G2 tool patch (.phc2) for interbus slot patching ? Control the pitch on a synth to another slot ?...
Not working with a "NoteSend" module linked to another slot...


Electromagnetic Wave wrote:
It seems that my problem is related to the polyphony. Because everything work fine in mono...

I resisted replying to your question back then. I was hoping that you would eventually realize that the G2 buss can only pass one signal value at a time, while the Scala modules in the polyphonic VA will produce a unique pitch offset value for each voice.

Electromagnetic Wave wrote:
...I want to understand something else. How to increase the resolution...

Yes, it appears that the pitch inputs of the oscillators quantize the signal to the nearest 1/128 of a semitone, even though the G2 system can produce control (pitch) signals much finer than that.

But, the G2 oscillators with an FM input can produce finer pitches in between this limit if you patch a pitch control signal into the FM input. I use this trick to get a very fine pitch detune that cannot otherwise be produced by just setting the Cent knob alone.

So with clever patching of pitch control signals into the FM inputs of capable oscillator modules, you should be able to get a much finer pitch offset than can be had by patching the Scala module signals into the oscillator pitch inputs.

Too bad that not all G2 oscillator modules have an FM input though Rolling Eyes

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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 79
Location: Kebek
G2 patch files: 12

PostPosted: Thu Jan 09, 2014 3:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
the G2 buss can only pass one signal value at a time

This is not the first time that the voice mode is causing me a headache. I've had a similar problem when I converted some NM1 patchs for the G2.

Quote:
the G2 oscillators with an FM input can produce finer pitches in between this limit if you patch a pitch control signal into the FM input.

Thank you! I just tried and it works well. But this is a parameter that I automates all the time to vary the timbre (as in the screenshot, the wellow part) in my synth patchs. I need to dig to fit all this.


FM exemple.JPG
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FM exemple.JPG


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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 79
Location: Kebek
G2 patch files: 12

PostPosted: Fri Jan 10, 2014 8:58 am    Post subject: Reply with quote  Mark this post and the followings unread

I was wrong. The pitch is controlled from the Osc1, not from the Osc2. It works.


Now I want to talk about the filter. When using a non-conventional scale (or just by changing the Master Tune in the System setting) the filter is not in harmony with the oscillator pitch.

The Equal Tempered
Chromatic Scale
(where Concert A = 440 Hz)

C4 = 261.63 Hz
C#4 = 277.18
D4 = 293.66
D#4 = 311.13
E4 = 329.63
F4 = 349.23
F#4 = 369.99
G4 = 392.00
G#4 = 415.30
A4 = 440.00
A#4 = 466.16
B4 = 493.88


The filter values (Hz) from C4 to B4 :

261.6, 277.2, 293.7, 311.1, 329.6, 349.2, 370, 392, 415.3, 440, 466.2, 493.9

Now when I use another scale, the filter stay in the Tempered Chromatic Scale


But... With the G2SCL.pch2 I can build a a filter that is representative of the scale I use. I patch a pitch control signal into the FM input from a "Ftl Nord" module. Next, I insert a "Constant Value" module and I patch the 1st cable from the "LevAdd2" module into the "Constant Value" module. To fix each step to the right Hertz into the "Sequencer Controlled" module, I use a white noise module before the filter (with a BR filter type). Like this I can recreate a sine. It's easy to fix all steps to the good Hertz.

My filter is in harmony with the pitch of the scale!

Thank you varice! As you say : "Too bad that not all G2 oscillators modules have an FM input though." Same for the filters!
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