Karlheinz Stockhausen
STERNKLANG – Supplement July 1995

During a performance in a hall which has the dimensions of, for example, 30 x 60 m and a long reverberation time – when standing in front of one of the 5 groups – too much from the neighbouring groups is heard. Therefore a larger hall must be chosen which has a short reverberation time.
    In addition, the percussion in the middle of such a hall must often be played too loudly in order to be heard by all groups. This dynamic level is, however, too loud for those listeners who are near the percussionist. Therefore, it is recommended that – also for performances in a hall – the percussion be picked up by a microphone and played over 5 monitor loudspeakers on the podiums of the groups, so that the percussion need not be played too loudly. The musicians should be able to adjust the volume of the monitor loudspeakers by themselves.

In order to arrive at a dynamic balance throughout, the individual group rehearsals should take place using the same sound equipment as in tutti rehearsals, with one sound projectionist per group operating the mixer. It is best for each group to have a sound projectionist who controls the dynamic balance using a small mixer, which is situated as low as possible at a slight distance in front of each group in the middle of the stereophonic loudspeaker play-back. The sound projectionist sits (also during the performance) within the semi-circle which is cordoned off to keep the audience at a suitable distance from the musicians. He has no podium.

For the tutti rehearsals, an intercom system must be available so that the musical director can make corrections to all groups over their monitor loudspeakers from the middle of the hall.

Although in the score on page 11 below 4a) it is explicitly said that the combinations must follow one another in uninterrupted succession, through the giving of entries from one model leader to the next, often a pause is made between the end of a combination and the beginning of the following one. This must by all means be avoided.
    The composition STIMMUNG is authoritative what concerns how to connect the models.

Before the beginning of an S-model, the previous combination should be continued until the S-model begins, if it is so notated in the form-scheme.

In the 1980 addendum, the text on page 7, section 27 is incomplete. The following sentence must be added:

After IV became subito , II played an section. II then became , and then I played an section.

The runner from III...