Eratosthenes' Chromatic

SCL Detail

Degrees: 7 • Period: 1200.00 cents • Source: Murray

Chromatic - Eratosthenes

File comments

Ancient Greek Tuning System Author: Eratosthenes Period: Ancient Greece (c. 276-194 BCE) Genus: Chromatic Reference: Table 8, murray_text_02_greek.md Chromatic tuning constructed entirely of superparticular proportions. Octave span: E to E Tetrachord structure: Two tetrachords with disjunctive tone B-A (9/8)

Playback

Select a tone, then click Begin. Use Arrow keys to step; Space stops. You can also use 1-0, qwertyuiop, asdfghjkl, zxcvbnm.

Overview (non-12°)

Degrees (now extended to 2 octaves)

#	Raw	Type	Ratio	Cents
2	20/19	ratio	20/19	89.00
3	19/18	ratio	19/18	182.00
4	6/5	ratio	6/5	498.00
5	9/8	ratio	9/8	702.00
6	20/19	ratio	20/19	791.00
7	19/18	ratio	19/18	884.00
8	6/5	ratio	6/5	1200.00
8		2nd octave		1289.00
9		2nd octave		1382.00
10		2nd octave		1698.00
11		2nd octave		1902.00
12		2nd octave		1991.00
13		2nd octave		2084.00
14		2nd octave		2400.00