Kleisma

← Unnoticeable comma

Interval region

Small comma →

Name	Kleisma
Lower bound	6¢
Upper bound	9¢
Example JI intervals
Intervals	15625/15552 (8.1¢) 243/242 (7.1¢) 225/224 (7.7¢) 1029/1024 (8.4¢) 16875/16807 (7¢) 65536/65219 (8.4¢)
Related regions
Superregion(s)	Small comma Comma Comma and diesis

English Wikipedia has an article on:

Kleisma

A kleisma is an interval of about 8.1 cents, roughly the size of the interval 15625/15552, which is called a kleisma in just intonation.

As an interval region, the kleisma is significant as it is a limit of intonational fidelity when playing on some physical instruments. That is, on free-pitch instruments, there is a level of precision to which one can be expected to play a note or interval "correctly": that level of precision is the kleisma. Another significance is that a lot of commas are about 3-4 kleismas in size.

Kleismas belong to the larger interval region of commas, which are part of the "comma and diesis" category.

Other definitions

• In sagittal notation, it is defined specifically as between half of the 200-comma ([317 -200⟩) and half of the Pythagorean comma ([-19 12⟩);
• In scale theory, the difference between a chroma and a diesis is called a kleisma, or more precisely a moskleisma, as used in extended meantone notation.

This disambiguation page lists pages associated with the title Kleisma. If an internal link led you here, you may wish to change the link to point directly to the intended page.