ECM turns 50 German music label honored with first-weekend concerts Anyone who has been a consumer of jazz (and classical) records or CDs over the past 50 years must surely be aware of the German label ECM. It has released albums by dozens of jazz greats, including Keith Jarrett, the Art Ensemble of Chicago, Pat Matheny, Mal Waldron, Vijay Iyer, John Abercrombie, Aaron Parks, Dave Holland, Paul Bley, Charles Lloyd,