Commas and EDOs
Hello! I was just checking your EDO impressions page, I see you're the first person to jot down impressions of EDOs in the hundreds since I've added my own EDO impressions to this site. I'm surprised that anyone bothered to jot down impressions of 118edo, 171edo, or 224edo before Flora could. I myself tend to compose with 159edo for a number of reasons, and, seeing from your main user page that you're a math nerd, I'm now wondering what insights you'd find in analyzing a comma that I found while checking over the structure of 159edo. This comma is 3489136640/3486784401 and has a monzo of [19 -20 1 0 3>. It proves to be the amount by which three instances of 729/704 fall short of 10/9, as well as the amount by which three instances of 880/729 exceed 225/128. The reason for me asking is that I'm looking for a descriptive name for this comma. --Aura (talk) 13:50, 10 June 2025 (UTC)
- I am surprised and honored that my user pages have been viewed by such an expert. I am sorry, but generally speaking, I am not familiar with either very large EDOs or very complex intervals. I have written impressions for some (53n+12)-edos (118, 171, 224) because they are good schismatic EDOs and usually support its 7-limit extension pontiac, which is also a microtemperament, just like how (12n+7)-edos (19, 31, 43) are good meantone EDOs. Schismatic and meantone are kind of similar: they both have the same structure as 3-limit JI; they are efficient temperaments supported by many EDOs; in optimized tunings, they both flatten 3/2 a bit to make 5/4 better; they both have an EDO with near-just 3/2 (12 and 53), a better generally but overtempered EDO (19 and 118), and the sum of the previous two, with near-optimized tuning and supporting many other useful temperaments (31 and 171). I am particularly interested in schismatic because of my previous research on 53edo. By the way, all of my user pages are currently unstable and may contain unsure ideas or feelings. (If my English contains any mistakes, feel free to correct me.) --Zhenlige (talk) 16:42, 10 June 2025 (UTC)