charlie parker, one of the most important improvisors in jazz, created melodies which were so strong which influenced so many people that they've become cliches of the language. for example, [plays sample] you would never want to play a whole improvisation with that, with that one idea, and in fact, most improvisations i play don't have that idea in them, but they may make reference in some way to that idea. the language of jazz is not just melodic cliches, it's also the harmonies that we use in jazz and the way the melodies that we use relate to the harmonies. for example, if i kind of outline a certain chord [ascending notes of a chord played individually] that chord wants to go somewhere else. it wants to go here. [descending notes of the same chord] now, if i'm going to improvise over those chords, i'm going to try to create a melody which fits with those harmonies. so you have to have not only a knowledge of the language, a sensitivity to what everyone else is playing, but also a sense of where you are, where you've been, and where you're going. that's tough. it's hard, but it a