To listen to music has not practical purpose

To listen to music or to sing a chant is to do something that has no practical purpose; it is just celebration and praise; it is just tasting the joy and beauty of life, the glory of God. Listening to it, even in the midst of a very purposeful day, reminds us to add the other dimension to our experience, the dimension of meaning, that makes it all worthwhile.

~ from THE MUSIC OF SILENCE by David Steindl-Rast
Music of Silence: A Sacred Journey through the Hours of the Day
By Ph.D. Brother David Steindl-Rast, Sharon Lebell