Joyful sound with musical instruments and singing of the choirs

1 Chronicle 15:16-29
David told the leaders of the Levites to appoint their fellow Levites as musicians to make a joyful sound with musical instruments: lyres, harps and cymbals
Kenaniah the head Levite was in charge of the singing; that was his responsibility because he was skillful at it. Kenaniah, who was in charge of the singing of the choirs.
So all Israel brought up the ark of the covenant of the Lord with shouts, with the sounding of rams’ horns and trumpets, and of cymbals, and the playing of lyres and harps.
David also wore a linen ephod.
Why?
The Lord is worthy to praise with joyful song, and Kenaniah is skillful at it.
David wear a linen ephod, for he respect the Lord with all his altitude.
How?
To be a worshipe need has the same altitude as David.