'Voice' in the Bible

and Zechariah, Aziel, Shemiramoth, Jehiel, Unni, Eliab, Maaseiah, and Benaiah [were to play] with harps tuned to Alamoth [that is, a high pitch];

and Mattithiah, Eliphelehu, Mikneiah, Obed-edom, Jeiel, and Azaziah were to lead with lyres set to Sheminith [that is, the eighth string, a low pitch].