A single chord tuned in just intonation, with each note's spectrum stretched using exponential curves to an interval of 21/20 (a "septimal chromatic semitone") and back again. The chord consist of the intervals 9/8 3/2 1…
Mesmerising me...
@jaguarmin: thanks very much
@industrialwaste-1: thanks!
@mimasmusic: Thank you.