What does 1 Chronicles 15:20 mean?

and Zechariah, and Aziel, and Shemiramoth, and Jehiel, and Unni, and Eliab, and Maaseiah, and Benaiah, with psalteries set to Alamoth;

And Zechariah, and Aziel, and Shemiramoth, and Jehiel, and Unni, and Eliab, and Maaseiah, and Benaiah, with psalteries on Alamoth;

and Zechariah, and Aziel, and Shemiramoth, and Jehiel, and Unni, and Eliab, and Maaseiah, and Benaiah, with psalteries set to Alamoth;

And Zechariah and Aziel and Shemiramoth and Jehiel, Unni and Eliab and Maaseiah and Benaiah, with corded instruments put to Alamoth.

and Zechariah, and Aziel, and Shemiramoth, and Jeheil, and Unni, and Eliab, and Maaseiah, and Benaiah, with psalteries besides virgins,

And Zacharias, and Oziel, and Semiramoth, and Jehiel, and Ani, and Eliab, and Maasias, and Banaias, sung mysteries upon psalteries.

and Zechariah, and Aziel, and Shemiramoth, and Jehiel, and Unni, and Eliab, and Maaseiah, and Benaiah, with lutes on Alamoth;