These are the men who served with their sons.

From the Kohathites: Heman the singer,
son of Joel, son of Samuel,

The singers, the heads of the Levite families, stayed in the temple chambers and were exempt from other tasks because they were on duty day and night.

Then David told the leaders of the Levites to appoint their relatives as singers and to have them raise their voices with joy accompanied by musical instruments—harps, lyres, and cymbals.

The singers Heman, Asaph, and Ethan were to sound the bronze cymbals;

Now David was dressed in a robe of fine linen, as were all the Levites who were carrying the ark, as well as the singers and Chenaniah, the music leader of the singers. David also wore a linen ephod.