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 Forum index » Clavia Nord Modular » G2 Building Blocks
PowerArpV2 - Creating patterns as a function of N and AX+B
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bantri



Joined: May 15, 2005
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PostPosted: Thu May 19, 2005 9:59 am    Post subject: PowerArpV2 - Creating patterns as a function of N and AX+B Reply with quote  Mark this post and the followings unread

This is the final result for an experiment that started with Mathstep, i think it came to a level of optimization and simplicity that it deserves creating a new topic.

The heart of the strucure for dealing with integer patterns is to create 2 modules
0 to N-1 Counter (optimized using digital circuits)
and
AX+B

then its possible to define any integer sequence in terms of those 2
both operate with signed integer math allowing both to receive inputs from both.
I made a very simple and clear example showing inputs and outputs for illustration purposes but once the principle is understood its possible to omit those to start building circuits with 0=>N-1 and AX+B blocks.

as an example
1,-1,+1... can be done with counter=01010101 and AX+B=-2X+1


PowerArp2005V2-Bantri.pch2
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mosc
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PostPosted: Thu May 19, 2005 11:24 am    Post subject: Reply with quote  Mark this post and the followings unread

Why are some of the modules labeled obsolete?
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bantri



Joined: May 15, 2005
Posts: 149
Location: brazil
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G2 patch files: 32

PostPosted: Thu May 19, 2005 11:56 am    Post subject: Reply with quote  Mark this post and the followings unread

These are modules that were used in PowerArp V1 and they were made using the same train of thought used to create MathStep, i have included them in version 2 just to show that you should avoid them because the new digital N-1 counter and the AX+B behave better. I was having a few cases on those where the N-1 result was equal to N-2 resulting in hearing the last note twice. The main catch for those obsolete modules is: both have clock inputs which is WRONG, when dealing with cyclical integer math there should be clock input only in the COUNTER module, never in the SUM/MULTIPLICATION module, because when you start using several counters and ax+b´s eliminating one extra clock input can save you from a big synchonizing error headache. I discovered this when i started trying to use pulse and pulse delay modules to compensate those errors... then when i changed the BPM those calibrated pulses and delays started failing again... use them as a last resource.
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bantri



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PostPosted: Thu May 19, 2005 4:58 pm    Post subject: PowerArp example with a few extra tricks Reply with quote  Mark this post and the followings unread

Heres an example using quadruple scale, div and mod 16 small function, 2 counters, 2 ax+b and one randomizer
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bantri



Joined: May 15, 2005
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PostPosted: Thu May 19, 2005 5:01 pm    Post subject: Previous post with missing attachment, posted here Reply with quote  Mark this post and the followings unread

PowerArp example


PowerArp2005V2Example01-Bantri.pch2
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cebec



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PostPosted: Thu May 19, 2005 5:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

great stuff, bantri. so much food for thought, here.
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Kassen
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PostPosted: Thu May 19, 2005 6:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Bantri, do you have some examples in mp3 or ogg of how you use this in tracks? I´d be very interested. I would also like to encourage you to perhaps share some ideas on how you see your arps relating to the overall track structure in the "composition" corner. If you´d like to and can spare the time, of cource.
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bantri



Joined: May 15, 2005
Posts: 149
Location: brazil
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G2 patch files: 32

PostPosted: Thu May 19, 2005 7:20 pm    Post subject: mp3 samples Reply with quote  Mark this post and the followings unread

I haven´t done any examples yet because i´ve just developed the method recently, if you want to hear some patterns the first ones that come to my mind are:

osho kundalini meditation
http://www.osho.nl/New-Osho-NL/Meditation/Kundalini.htm

twiddly bits demos from keyfax
http://www.keyfax.com/keyfax/New_Twid.html

tablatorium percussive patch for reaktor

and trance music from shakta, talamasca, infected mushroom, astrix, yahel, muses rapt, sun project, alien project and so many others that make this kind of music

also note that currently the generator creates only constant length and constantly spaced notes, but those can follow the same principles applied to note pitch
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