Listen for a playful murmuring. The unicorns murmured, and several of them lay down with the abrupt motion of a cat that wants to play. -- Pamela Dean, The Secret Country (2003) A unicorn's playful murmuring may sound like: a mystic's flute a small wind rising through the grass the babbling of two intersecting brooks a form of talk beyond language an eerie music box a ripple of surprise three graduate students drinking coffee Notice how this waveform of a unicorn's murmuring seems to improvise at the end, playfully galloping off on a new course.