Aeolian mode

tone - semitone - tone - tone - semitone - tone - tone

Starting on the note A, this produces a scale with the notes A, B, C, D, E, F, G, A

{a b c'd'e'f'g'a'2}

And they played softly in the Aeolian mode a music that was like the wailing of wind through bare branches on a moonless night, and the Red Foliot leaned forth from his high seat and recited this lamentation: […]