Another interesting moment in the DVD called, Keith Jarrett: The Art of Improvisation is when, after a soundcheck, both members of the Standards Trio rhythm section (Gary Peacock and Jack DeJohnette) sit down at separate pianos (apparently Jarrett likes to choose one at the last minute) and begin improvising together. The fact that every member of the trio is a multi-instrumentalist isn't a big surprise, but the way that Peacock described the importance of the piano in an interview segment was: He got to the essence of the instrument by saying that it's vital for a bassist, for any musician really, to play the piano because "it provides context", which is a very cool way of saying harmony ("setting" is another good one). It reminded me of the fact that notes only have meaning in relation to other notes, and that these relationships can become increasingly complex and interesting when we take the time to listen with this in mind. (It also explains why perfect pitch is of no importance in the making of music - it's entirely based on relative pitch, i.e. hearing the notes in context.) I once had a teacher who said that Gary Peacock was his favourite bassist because "every note he plays is a surprise and yet somehow just right". I suppose a lifetime of intense harmonic study had something to do with it. Here he is in another great trio, with Paul Bley and Paul Motian, playing "Don't You Know" from their 1999 album, Not Two Not One: http://www.youtube.com/watch?v=RidEEFURoAs