a celestial blessing a bizarre growl a slow percolation a relic of an unknown sound spectrum a piece of wizardry a "wolf whistle" Accounts of unicorns' cascading glissandi in literature include: He shone in the moonlight, his voice warm as sunshine, and his eyes clear sky blue. He sang to [them] with amusement. . . . His grand song arched over them, cascading glissandos of starlight notes forming a rainbow road on which they galloped over the treetops. -- Conrad Wong, "Chasing Unicorn Songs" (1990)