1 Chronicles 9:33

33 Those who were musicians, heads of Levite families, stayed in the rooms of the temple and were exempt from other duties because they were responsible for the work day and night.

Read 1 Chronicles 9:33 Using Other Translations

And these are the singers, chief of the fathers of the Levites, who remaining in the chambers were free: for they were employed in that work day and night.
Now these, the singers, the heads of fathers' houses of the Levites, were in the chambers of the temple free from other service, for they were on duty day and night.
The musicians, all prominent Levites, lived at the Temple. They were exempt from other responsibilities since they were on duty at all hours.

What does 1 Chronicles 9:33 mean?

John Gill's Exposition of the Bible
1 Chronicles 9:33

And these are the singers, chief of the fathers of the
Levites
Others of them were employed in singing, and were masters of the song, and presided in that service, see ( 1 Chronicles 6:31 ) who remaining

in the chambers were free;
from all other work and service; and there they abode, even in the chambers of the temple, that they might be near to perform their work, and not be defiled, and made unfit for it:

for they were employed in that work day and night;
some or other of them, either in composing or singing psalms and hymns, or teaching others how to sing them.

California - Do Not Sell My Personal Information  California - CCPA Notice