And David spake to the chief of the Levites
The six before mentioned, ( 1 Chronicles 15:11 )
to appoint their brethren to be the singers;
before the ark, as they brought it up:
sounding by lifting up the voice with joy;
the instrumental music was to be attended with vocal music, and that very sonorous and loud, and performed with all tokens of inward joy and gladness, as the occasion required.