Golden Ratio (In)Harmonic Polyrhythm Metronome

[musicman8820]

sounds like when im in my car with the turning light on and the door is open

[1056015]

My dear friend .. your videos contact between music rhythms and numerology .. I am amazed to find out. And the wonderful way you do it

[andykins118118]

i like the way they're floating over the ocean

[robertinventor]

(1 + sqrt(5) ) / 2 - look it up in wikipedia for lots more info.

[clanbigger4]

What's the formula for the golden ratio?

[robertinventor]

@clanbigger4 (1 + sqrt(5) ) / 2 - look it up in wikipedia for lots more info.



[youngrelleus19]

the golden ratio sounds like shit 

[ZOMFG102]

wut?

[underscoreisnotvalid]

im sure meshuggah will one day turn this into a groove :)

[sheatheman]

basically a few cents flat of a minor 6th

[robertinventor]

@sheatheman Yes. It's 833.0903 cents - minor sixth is 900 cents, major sixth is 800 cents. So it's a minor sixth two thirds of a semitone flat, or a major sixth a third of a semitone sharp.

[sheatheman]

actually my original comment was incorrect. its 33 cents sharp of a minor 6th. a major sixth is the wider interval. So it's like this, the period representing the golden ratio.

m6 .  M6

[robertinventor]

@sheatheman Yes you are right, sorry, my mistake. It's 833.0903 cents - minor sixth is 800 cents, major sixth is 900 cents. So it's a major sixth two thirds of a semitone flat, or a minor sixth a third of a semitone sharp (or a sixth of a tone sharp).

[robertinventor]

@robertinventor Or using just intonation ratios, it goes 8/5 g 5/3 in increasing size of interval.

[robertinventor]

Removed my incorrect post to prevent confusion

[sheatheman]

@robertinventor i like that. 1/6 of a tone

[robertinventor]

Yes you can, the general formula is (a + bφ)/(c + dφ) – where a, b, c, and d are integers such that ad − bc = ±1.

But most irrational numbers like π are easier to approximate than φ - e.g. with the well known approximation 22/7 for π.

I've done a page on the bouncemetronome site about this and will add links to the video description - and also links to the wiki pages.

[talesofdork]

you can create an infinite # of most out of tune or hardest to approximate polyrhythms in the manner, just as there are an infinite number of irrational numbers

[robertinventor]

I've made a new version of this video - main thing just HD and antialiasing - see video response

[holohulolo]

As it plays nearer to the end, and as my eyes are following the movement, I was mesmerized by it, or rather, hypnotized.

[mrsbrown333]

thank you..do you have any links to 432 mghurtz music

[LemonInYourEye]

cool