,以達至一個緊張、不安氣氛、或作為過場段的轉接。 Haluska, Ján (2003). The Mathematical Theory of Tone Systems, Pure and Applied Mathematics Series 262 (New York: Marcel Dekker;
distorted solos that might be counted the distant ancestors of heavy metal. Shepard, John. Continuum Encyclopedia of Popular Music of the World. Performance