On January 24, 1975, Keith Jarrett gave a solo piano performance at the Opera House in Cologne, Germany. The concert lasted a little over an hour, it was entirely improvised, and it was recorded and turned into a double album, “The Köln Concert,” released later that year. It became the best-selling solo album in jazz history, as well as the best-selling piano album. And when you listen to it you can hear why.
The 1970s were a piano-man age. Think Billy Joel and Elton John, and also Chick Corea and Herbie Hancock and Jan Hammer and Jarrett. There are Keith Jarrett albums that have more pyrotechnical dazzle than “The
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