intone

To give tone or variety of tone to; to vocalize.

To utter with a musical or prolonged note or tone; to speak or recite with singing voice; to chant.

to intone the church service

But when the moon rose and the breeze awakened, and the sedges stirred, and the cat’s-paws raced across the moonlit ponds, and the far surf off Wonder Head intoned the hymn of the four winds, the trinity, earth and sky and water, became one thunderous symphony—a harmony of sound and colour silvered to a monochrome by the moon.

To utter a tone; utter a protracted sound.