Nat Hentoff, Liner notes for John Coltrane: Giant Steps (Deluxe Edition), su rhino.com, Rhino Entertainment, 1960. URL consultato il 15 febbraio 2008 (archiviato dall'url originale il 17 agosto 2002).
«While he was with Miles, Coltrane was tagged with the phrase "sheets of sound." Jazz critic Ira Gitler had first used it. These "sheets of sound" were multinote hailstorms of dense textures that sound like a simultaneous series of waterfalls. "His continuous flow of ideas without stopping really hit me," Gitler said. "It was almost superhuman. The amount of energy he was using could have powered a spaceship."»
