This item is not in the library — it is a part of: Improvisational Theatre and Music Games.
Players stand in a circle with their eyes closed
After some breathing exercises they start to sing held notes
Every person should be singing at the same volume to create a group chord
It can sound horrible, or beautiful. Embrace both.
Some variant of the above you can see at many improvisation workshops (like "One Note Piece" of Music for People) and instrumentally as an intro to every second kraut rock concert… See the video for it from Pass the Sound series as The Condensed Sound Bath.
The description is taken from http://www.musicalimprovcomedy.co.uk/list-of-musical-improv-games.html (check it out!)
free-improv constellations in-genre algorithm loop spatial minimal
conducting dance drawing gestures guess interpret listen memory
composers events insert narrative quick random rhythm role-play speeding-up timed tonal