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The Electrum temperaments are a group of rank-2 temperaments proposed by Iwuqety, inspired by the idea of using the acoustic phi (golden ratio [math]\displaystyle{ φ }[/math]) and acoustic silver ratio [math]\displaystyle{ δ_s }[/math] as generators, respectively replacing the 3/2 perfect fifth and the 2/1 octave used in common practice music. Electrum refers to naturally-occurring alloy which is mainly made up of gold and silver.

Untempered version (arranged in quasi-Pythagorean fashion)

Intervals with hyper-generator [math]\displaystyle{ φ }[/math]			Intervals with hypo-generator [math]\displaystyle{ φ^{-1} }[/math]
In terms of metallic ratios	In surd form	Absolute cents	In terms of metallic ratios	In surd form	Absolute cents
1		0	[math]\displaystyle{ δ_s }[/math]	\frac{1 + \sqrt2}{2}	1525.854