President Henry B. Eyring: Music & Answers to Prayers
“You can pray as the choir is about to sing. The choir director, the organists, and the choir members have prayed and practiced with a prayer in their hearts and with faith that the music and the words will soften hearts and magnify their power to build others’ faith. They will perform for the Lord as if they were before Him, and they will know that our Heavenly Father hears them as surely as He hears their personal prayers. Together they have labored with love to make the promise of the Savior to Emma Smith come true: “For my soul delighted in the song of the heart; yea, the song of the righteous is a prayer unto me, and it shall be answered with a blessing upon their heads” (D&C 25:12)."
"If you not only listen but also pray as they sing, your prayer and their prayers will be answered with a blessing upon your head as well as theirs. You will feel the blessing of the Savior’s love and approval. All who join in that praise will feel their love for Him grow.”
April 2016 General Conference.