Kenaniah the head Levite was in charge of the singing; that was his responsibility because he was skillful at it.
NIV
Chenaniah, leader of the Levites in singing, was put in charge of carrying the ark and lifting up song. He instructed about these matters because he was skilled and able.
AMP
And Chenaniah, chief of the Levites, was for song: he instructed about the song, because he was skilful.
KJV
"Speak to the Levites and say to them: 'When you receive from the Israelites the tithe I give you as your inheritance, you must present a tenth of that tithe as the LORD's offering."
NIV
Moreover, you shall say to the Levites, When you take from the Israelites the tithe which I have given you from them for your inheritance, then you shall present an offering from it to the Lord, even a tenth of the tithe [paid by the people].
AMP
Thus speak unto the Levites, and say unto them, When ye take of the children of Israel the tithes which I have given you from them for your inheritance, then ye shall offer up an heave offering of it for the LORD, even a tenth part of the tithe.
KJV
The Levitical priests – indeed, the whole tribe of Levi – are to have no allotment or inheritance with Israel. They shall live on the food offerings presented to the LORD, for that is their inheritance.
NIV
THE LEVITICAL priests and all the tribe of Levi shall have no part or inheritance with Israel; they shall eat the offerings made by fire to the Lord, and His rightful dues.
AMP
The priests the Levites, and all the tribe of Levi, shall have no part nor inheritance with Israel: they shall eat the offerings of the LORD made by fire, and his inheritance.
KJV
The duty of the Levites was to help Aaron's descendants in the service of the temple of the LORD: to be in charge of the courtyards, the side rooms, the purification of all sacred things and the performance of other duties at the house of God.
NIV
But their duty should be to wait on [the priests] the sons of Aaron in the service of the house of the Lord, caring for the courts, the chambers, the cleansing of all holy things, and any work of the service of God's house
AMP
Because their office was to wait on the sons of Aaron for the service of the house of the LORD, in the courts, and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God;
KJV
So he stood at the entrance to the camp and said, "Whoever is for the LORD, come to me." And all the Levites rallied to him.
NIV
Then Moses stood in the gate of the camp, and said, Whoever is on the Lord's side, let him come to me. And all the Levites[the priestly tribe] gathered together to him.
AMP
Then Moses stood in the gate of the camp, and said, Who is on the LORD's side? let him come unto me. And all the sons of Levi gathered themselves together unto him.
KJV