[3] Between 14 March and 14 September 1970, Pole was played and sung over a thousand times at Expo '70 in Osaka, Japan, in daily performances by twenty different musicians including the composer.
[3] Pole consists of a sequence of approximately 200 events, grouped into seven sections divided in the score by wavy barlines.
[2] To the signs previously used in Prozession, Kurzwellen, Spiral, and Expo Stockhausen adds some new ones and, for the first time, notated the sound-projectionist part which had been left to improvisation in the earlier pieces.
The sounds of the two soloists are initially placed at the opposite poles (which may be the front and back of the hall, in ordinary spaces, distributed over eight or more channels).
At first these sounds occasionally dip toward each other, and then fan out over their respective axes, followed by stairstepping back and forth over independent paths in three dimensions in a breathtaking spatial experience.