God has bestowed upon his people the gift of song. God dwells within each human person, in the place where music takes its source. Indeed, God, the giver of song, is present whenever his people sing his praises.
Music is therefore a sign of God's love for us and of our love for him. In this sense, it is very personal. But unless music sounds, it is not music, and whenever it sounds, it is accessible to others. By its very nature song has both an individual and a communal dimension. Thus, it is no wonder that singing together in church expresses so well the sacramental presence of God to his people. (Sing to the Lord, USCCB, 1-2)
Let the word of Christ dwell in you richly, as in all wisdom you teach and admonish one another, singing psalms, hymns, and spiritual songs with gratitude in your hearts to God. (Colossians 3:16)