Conversation so far:
Who are the quartets with Keith Jarrett?
The quartet members played various instruments, with Keith Jarrett often being heard on soprano saxophone and percussion as well as piano
What was the quartet members roles in the Keith Jarrett quartets?
Dewey Redman on musette, a Chinese double-reed instrument; and Paul Motian and Charlie Haden on a variety of percussion.

Question: What performances they did in 1970s?
Self-contained rewrite: What performances the Keith Jarrett quartets did they do in 1970s?