Aus den sieben Tagen

[2] During daylight hours, including the remaining two days, Stockhausen wrote "many poems," as well as reading Satprem's book on Sri Aurobindo, and experienced "many extraordinary things".

[4] The first of the pieces to be officially premiered was Es, performed in Brussels on 15 December 1968 on a concert of the Rencontre de Musique Contemporaine, by the Stockhausen Group, joined by Michel Portal, Jean-Pierre Drouet, and Jean-François Jenny-Clark.

[5] However, an earlier, unofficial performance of both Es and Treffpunkt, by the Arts Laboratory Ensemble with Hugh Davies and trombonist Vinko Globokar with Stockhausen at the potentiometers, took place on 25 November 1968 in London, as part of the Macnaghten Concerts.

The three actors were Sigrid Koetse (woman), Jan Retèl (man), and Keesjan van Deelen (child), with the instrumentalists of the Stockhausen Group and the composer doing the sound projection.

[24]Each text focuses on one or several of Stockhausen's main artistic concerns, such as extending the listener's perceptions of time and pitch, reconciling opposing tendencies, or shifting awareness from one perceptual area to another.

Twelve of the other pieces describe musical processes or states, in three different general types, and the remaining two, Litanei and Ankunft are more in the nature of manifestos, to be read aloud either by a single speaker or a speaking choir.