A complete performance begins with the melody corresponding to the zodiac sign within which the day of the performance falls, and proceeds through the twelve melodies of the cycle, ending with a return to the starting melody. Each melody is to be played at least three times through, with variations or improvisations, which in some performances have been very extensive. Though performances documented in recordings last between 12 and 63 minutes, a complete performing version by the violin-piano duo of Andrew and Gail Jennings is claimed to last 96 minutes, but they have declined to play their version complete in public. The melodies can also be played individually, or in smaller numbers.