major scale randomisation


    Nov 25 2011 | 7:46 pm
    anyone know how would i get the random object to generate a value between 1-12 based on the major (TTSTTTS)scale. The notes i need are 1,3,5,6,8,10,12.
    any help would be appreciated.

    • Nov 25 2011 | 8:04 pm
      Since the pattern of T and S in a major scale is not easily obtained by a mathematical formula, it's best just to store it in a table. Here's an example using the numbering system 0,2,4,5,7,9,11. Just add 1 to that to get your numbering system. The example also includes a formula to generate a stack of fifths in Lydian mode, which you can convert into an out-of-order C major scale, but the table lookup method is more efficient and straightforward. Add some whole-number multiple of 12 to transpose these pitches to different octaves, and add some number of semitones to transpose to a different key.
    • Nov 25 2011 | 8:12 pm
      I'm not at a computer with max on but from memory something like [random 7] to [zl lookup 0 2 4 5 7 9 11] should get you started
    • Nov 25 2011 | 8:15 pm
      fun :)
      you want [random] to make random index numbers, which look up the scale degrees you want, rather than try and generate the numbers themselves. Then you can load a [umenu] or other list-based data structure (table, multislider, etc.) with as many scales as you want:
      (edit: zl lookup eliminated a half-dozen objects in my original patch...doh :)
    • Nov 25 2011 | 8:29 pm
      I have a "jump into the deep end of the pool" note / scale quantizer called ScaleMaster, which can be found here: http://www.xfade.com/max/ScaleMaster/
      Also Christopher, in your patcher, the table wasn't set to save data with patcher.
    • Nov 25 2011 | 8:46 pm
      amazing thanks. i'll try this when i get home.
    • Nov 25 2011 | 11:51 pm
      @Chris Muir: Thanks. Felt sure I had done that, but maybe I hadn't yet saved the patcher. Here's a revised version:
    • Nov 26 2011 | 12:35 am
      Or simpler, with [zl scramble]. It automatically scrambles everything from a list, and you code less.