Origin of tetrachord
Examples from the Web for tetrachord
Historical Examples of tetrachord
The early lyre of the Greeks had four, constituting their tetrachord.Essays: Scientific, Political, & Speculative, Vol. I
In the enharmonic, the tetrachord consists of two tones and two "dieses."
These three classes differ in their arrangement of the tetrachord.
It naturally disappeared when the tetrachord Hypatn came into use.
But within the tetrachord the reign of diversity was unchecked.