And produced some rewarding results.
From
https://www.stereophile.com/content/2015-records-die-page-6:
"How to describe
Stimmung? Composed in 1968, it comprises 51 "models" for six unaccompanied voices. The models range in length from 38 seconds to 5 minutes, but I experience them as 78 minutes of almost unbroken immersion, surrounded by conversations in varying intonations and meters. Gradually, I am subsumed enough to feel the urge to join in. Of course, a relaxed mood, aided in any way you choose, will help you to connect with what seems superficially to be early minimalism, but a listener in the right frame of mind will be very much inside the music. Mesmerizing. (KR)"