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JI Percussion
charlieferret
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I have tried to make a literal representation of this from Mat Cooper:
“I consider rhythm to be ultra-low pitch. Polyrhythms are then Just Intonation. For example if rhythm1 cycles through 4 beats in the same time as rhythm2 cycles through 3 beats, this can be considered as 2 pitches in the frequency ratio 4:3. Polyrhythms are therefore rhythmic harmony.
I like the idea of Just Intonation music where polyrhythms are derived from the JI scale. The rhythms are tuned to the scale.
Mat Cooper.”
The cymbal is in the Fibonacci series counting by measures. Then there is a drum at every whole, half, half tripelet, and quarter note. This gives a series of 1:2:3:4 - which are off set slightly since in the real world the sound source woudll be out of phase. And then I gradually change the tempo from 10 bpm to 1000 bpm (as fast as Sonar X1 will go).
Norm
said
Well, is it microtonal? What do you make of this? As for me, when it is in a tempo range that I can follow (mid range) it sounds like a basic 4vs.3 polyrhythm. This makes sense to me, as all of the drum tones drop back into the their common denominator of 4 or 3 and resound in unison. So, I get the sense of polyrhythm, but not microtonality. It would be interesting to me to repeat this experiment with, for example, piano key tones to see if the results are the same, i.e. is one left with a sense of 4vs.3 polyrhythm or something else. My hypothesis is that the effect will be the same. I do not believe the pitch of the notes relate to this question. And I also think that at this point I do not agree with the premise that "polyrhythms are then Just Intonation": polyrhythms represent a relationship in time, whereas Just Intonation represents a relationship in pitch.
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