Russell notes that "[f]ree music which uses rock instrumentation and aesthetics [...] can harness a noise more purely random and less limited by subjective considerations than that of any but the most determined acoustic musicians"
among those "most determined": "the unamplified attack of the Borbetomagus reeds, Brötzmann, or many North African trumpet musics"
free music within the rock idiom: "Rudolph Grey [Borbetomagus guitarist], Donald Miller and hundreds of others doing the same thing on a subconscious level"