The bibles says to: Sing unto him a new song; play skillfully with a loud noise. Psalms 33:3

David was a musician and was famous for both the skill by which he played and the anointing under which he ministered; truly anointed music has a powerful effect on its hearers and Spiritual deliverance can be obtained through the anointing. 

"The priests could not stand to minister" because the Presence of the Lord was so real. 2Chronicles 5:14

The scriptures repeatedly exhort us to "sing unto the Lord, therefore, we make singing, dancing in the lord and shouting a key component in our services.