"She [Joni Mitchell] wanted to have that (jazz) element in her music. Of course, when she heard Jaco's [Jaco Pastorius'] music and met him, that floored her -- really grabbed her. She decided that Wayne Shorter was really conducive to her music. She would speak metaphorically about things. "I want this to sound like a taxicab driver, or a taxi in New York," or "I want this to sound like a telephone ringing." She would speak to musicians like that, and we really tuned into what she would want our music to be."