Re: [sc-users] Twelve-Tone Matrix

~row = [ 3, 1, 9, 5, 4, 6, 8, 7, 0, 10, 11, 2 ];

~rowInversion = ~row.invert(~row.first) % 12;

~matrix = ~rowInversion.collect({| t | ~row + (t - ~row.first) % 12 });

~matrix.printAll; ""

Cheers,

Sergio

Sergio Luque

www.sergioluque.com

On 28 Dec 2017, at 14:07, generic.190324895831290@xxxxxxxxx wrote:

Hello,

I am trying to create an algorithm to generate 12-tone matrices, like the one here:

http://www.instructables.com/id/Create-a-Twelve-Tone-melody-with-a-Twelve-Tone-Mat/

I'm getting stuck, though - processing arrays is still very mysterious to me. I'm not sure what the correct way to do this all is. So far, I think I have the first process in place.. but I'm not sure how to get to the next process.

//starting row;
~row1=[3, 1, 9, 5, 4, 6, 8, 7, 12, 10, 11, 2];

~column1=
{
arg row, new=Array.new(12);
for (0, row.size-1, {
arg i=1;
var next = row[i-1];
if (prev == nil) {prev=0} //case against nil
{|x, b|
x=(row[i]-next); //subtract the next row item from the current row item
if (x < 0) {b=x.abs} {b=0-x}; //if negative, go positive. if positive, go negative.
new.add(b); //add to array.
};
});
new.postln;
};

~column1.(~row1);

Thank you,
J