Diaschisma

Source: Wikipedia, the free encyclopedia.
Diaschisma on C Play.
Diaschisma as four perfect fifths plus two major thirds.

The diaschisma (or diacisma) is a small

Helmholtz; earlier Rameau
had called that interval a "diminished comma" or comma minor.

A diaschisma is the difference between a

Pythagorean minor second
, or 256/243, which would make the other half either 25/24 (70.67 cents) or about 45 cents. The diaschisma may be approximated by 89/88, 19.56 cents.

three octaves (above) and four perfect fifths plus two major thirds (below)

46
notes all temper it out.

See also

References

  1. . Diaschisma.
  2. ^ "Diaschisma", Merriam-Webster.com.
  3. ^ (1897). Columbian cyclopedia, Volume 9, np. Garretson, Cox & Company. pre-ISBN.