The interval which forms the difference between the 5-limit "chromatic semitone" with the ratio 25:24 = 2-3 3-1 52 = 2,3,5-monzo [-3 -1, 2 > , and the pythagorean "tricomma" with the ratio 150094635296999121 : 144115188075855872 = 2-57 336 = 2,3-monzo [-57 36, > .
The monzisma's ratio is thus 450359962737049600 : 450283905890997363 = 254 3-37 52 = 2,3,5-monzo [54 -37, 2 > = ~0.29239571 cent (roughly 2/7 of a cent).
The term was coined by Margo Schulter in honor of tuning-theorist Joe Monzo.
Schulter, Margo.
Yahoo Tuning Group message 22165 (Sun May 6, 2001 7:13 am).
The tonalsoft.com website is almost entirely the work of one person: me, Joe Monzo. Please reward me for my knowledge and effort by choosing your preferred level of financial support. Thank you.