Top all-time · #19291
Roel Hollander
Personal blog · roelhollander.euculturemath
Roel Hollander writes ROEL\'S WORLD (blog), a personal blog at roelhollander.eu about culture and math. Since 2017, 4 different Hacker News readers have linked it 6 times. No feed was found, so read it on the site itself.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
HN commenters link Hollander's posts to explain music theory, including Coltrane's tone circle drawing as a whole tone scale and the 12-TET and 432 Hz tuning math. The comments are references, not judgments.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
“Roels World” is a philosophical, semiscientific, contemplative blog by Roel Hollander about Music, Sound, Arts, Sacred Geometry and more.
Most-linked posts?
- /en/blog-saxophone/Coltrane-Tone-Circle/2 people · 2 mentions · first linked 2017-04-14
What Hacker News says?
yes it must be a mistake it seems in other drawings which appear to also be by Coltrane they are drawn as you suggest, A + Ab/Bb preserving the symmetry https://roelhollander.eu/en/blog-saxophone/Coltrane-Tone-Cir...
Comment linking /en/blog-saxophone/Coltrane-Tone-Circle/
on “John Coltrane Draws a Picture Illustrating the Mathematics of Music”Submitted Music and Geometry as a story · 1 points
HN discussionNot quite. It's actually a hexatonic scale, AKA the whole tone scale. Each note is a whole step up from the last one. The outer circle is a C whole tone scale and the inner circle is a B whole tone scale (i.e. they're offset by a half step). The circles and lines are used to highlight other harmonic relations, like the circle of fifths. The following blog post explains it in more detail. https://roelhollander.eu/en/…
Comment linking /en/blog-saxophone/Coltrane-Tone-Circle/
on “John Coltrane Draws a Picture Illustrating the Mathematics of Music”Submitted Renold-I Temperament (“The Scale of Fifths”) as a story · 1 points
HN discussionYep, but only using 12-TET @ C4=256Hz. A “Twelve True-Fifths Tuning” is suggested though to get the magical number, similar to violin standard tuning method. [1] [1]: https://roelhollander.eu/en/432-tuning/the-scale-of-fifths/#...
Comment linking /en/432-tuning/the-scale-of-fifths/
on “Music Tuned to 440 Hz versus 432 Hz and the Health Effects”Submitted Pitch Inflation – The War of Music as a story · 1 points
HN discussion