Eratosthenes' Diatonic

SCL Detail

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

Diatonic - Eratosthenes

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Ancient Greek Tuning System Author: Eratosthenes Period: Ancient Greece (c. 276-194 BCE) Genus: Diatonic Reference: Table 15, murray_text_02_greek.md Identical to Ptolemy's Diatonic Ditoniaion. This is the classic Pythagorean tuning with equal major tones (9/8) and Pythagorean semitone (256/243). 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	256/243	ratio	256/243	90.00
3	9/8	ratio	9/8	294.00
4	9/8	ratio	9/8	498.00
5	9/8	ratio	9/8	702.00
6	256/243	ratio	256/243	792.00
7	9/8	ratio	9/8	996.00
8	9/8	ratio	9/8	1200.00
8		2nd octave		1290.00
9		2nd octave		1494.00
10		2nd octave		1698.00
11		2nd octave		1902.00
12		2nd octave		1992.00
13		2nd octave		2196.00
14		2nd octave		2400.00