Idiosyncrasies
One of Jarrett's trademarks is his frequent, loud vocalizations (grunting, squealing, and tuneless singing), similar to that of Glenn Gould, Thelonious Monk, Erroll Garner, Oscar Peterson, Ralph Sutton, Willie "The Lion" Smith, Paul Asaro, and Cecil Taylor. Jarrett is also physically active while playing, writhing, gyrating, and almost dancing on the piano bench. These behaviors occur in his jazz and improvised solo performances, but are for the most part absent whenever he plays classical repertory. Jarrett has noted his vocalizations are based on involvement, not content, and are more of an interaction than a reaction.
However, Jarrett is notoriously intolerant of audience noise, including coughing and other involuntary sounds, especially during solo improvised performances. He feels that extraneous noise affects his musical inspiration, and distracts from the purity of the sound. As a result, cough drops are routinely supplied to Jarrett's audiences in cold weather, and he has even been known to stop playing and lead the crowd in a group cough. This intolerance was made clear during a concert on October 31, 2006, at the restored Salle Pleyel in Paris. After making an impassioned plea to the audience to stop coughing, Jarrett walked out of the concert during the first half, refusing at first to continue, although he did subsequently return to the stage to finish the first half, and also the second. A further solo concert three days later went undisturbed, following an official announcement beforehand urging the audience to minimize extraneous noise. In 2008, during the first half of another Paris concert, Jarrett complained to the audience about the quality of the piano that he had been given, walking off between solos and remonstrating with staff at the venue. Following an extended interval, the piano was replaced. In 2007, in concert in Perugia during the Umbria Jazz Festival, angered by photographers Jarrett implored the audience: "I do not speak Italian, so someone who speaks English can tell all these assholes with cameras to turn them fucking off right now. Right now! No more photographs, including that red light right there. If we see any more lights, I reserve the right (and I think the privilege is yours to hear us), but I reserve the right and Jack and Gary reserve the right to stop playing and leave the goddamn city!" This caused the organizers of the Festival to declare that they will never invite him again.
Jarrett has been known for many years to be strongly opposed to electronic instruments and equipment. His liner notes for the 1973 album Solo Concerts: Bremen/Lausanne states: "I am, and have been, carrying on an anti-electric-music crusade of which this is an exhibit for the prosecution. Electricity goes through all of us and is not to be relegated to wires." He has largely eschewed electric or electronic instruments since his time with Miles Davis.
Jarrett is a follower of the teachings of Georgian spiritual teacher G. I. Gurdjieff, and in 1980 recorded an album of Gurdjieff's compositions, called Sacred Hymns, for ECM.
Jarrett has also visited Princeton University's ESP lab run by Robert Jahn.
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