Syncopated harmonic polyrhythm - 8 : 5 as 3+2+3 : 3+2, shifted by fractional beats
Channel: robertinventor
Date: 2012-11-18

Shows Bounce Metronome from http://bouncemetronome.com Inspired by an idea from African drumming -  instead of playing a straight 13:5 always the 13 beat part exactly meets the 5 beat part at the measure beat, you can play the 13 and 5 so they meet each other at other positions in the measure instead of the measure beat. 

The pitches played, from left to right and near to far in the video are
2/1 3/1 12/5 13/1 24/5 3/1 4/1 1/1 with the 1/1 set to 65.406 Hz (C two octaves below middle C, concert pitch)

If you want to play it endlessly- well at least many times - try this playlist: http://www.youtube.com/watch?v=1Fak5pxChFU&feature=autoplay&list=PLjdDsipyFoLVzptilWMBde77Z0XlwkJUB (jut the same video over and over)

The 8 is accented as 3+2+3 and the 5 as 3+2 and  those patterns start at different places in the measure as well. 

With 13:5 then you would need to do 18 parts playing at once to play all the possibilities - which would be such a dense texture it might be hard to hear what is going on.

In this video then I've done just three parts for the 13 beats to a measure, and three parts for the 5 beats to a measure (plus an extra part to do extra emphasis for one of the 13 beat parts)

To make this rhythm I set all the parts to play 65 beats to the measure - and then simply skipped the beats that needed to be skipped to make this rhythm. You could alternatively enter it as music notation for all the parts using the Drum & Dance rhythm editor. But this skipping beats method is probably easier to use.