I rolled my 20-sided dice at roll-dice-online.com: Die 1 = 15, Die 2 = 11. The site felt it necessary to show me the average (13) of the two rolls, so I put it to use.
Per the supplied chart, 15 gave me the melodic series GDBGG, 11 gave the rhythmic 442, and I composed the piece in a 13/4 time signature using Musescore 2.
The violin cycles the melody through crotchet, crotchet, minim until the loop completes. The viola splits the 13 beats–1,2,3,1,2,3,1,2,3,1,2,1,2– with GDBGG falling on the 1s while also following the crotchet, crotchet, minim assignment. I’m sure there is a simpler way to have explained that, but I’m applying theory on the fly here. Judging from how much I hurt my brain completing this challenge, if I ever hear anyone saying chance operations take all the skill out of music making I’ll be setting them straight good and proper.
More on this 298th weekly Disquiet Junto project — Dungeons & Drum Machines: Make a track with two rolls of a 20-sided die — at:
Major thanks to Jason Wehmhoener for initiating this project, and for co-plotting it.
More on the Disquiet Junto at:
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Image used thanks to a Creative Commons license by Flickr user Konstantin Lazorkin: