Alec and Nick take up sound systems as a point of entry into the discussion of technological and cultural evolutions of listening. The episode explores a range of material, social and philosphical contexts for musical mediatization including Dub sound systems, the contemporary DJ, musique concrete and multichannel acousmonia, and the production of a pure abstract music via word scores and other speculative music forms. The conversation touches on the concept of shizophony, similarities between audiophile and classical music paradigms, the social contract of witnessing sound dissemination as an acoustic phenomenon, Henry Flynt's "concept art" notion of constitutive dissociation and personal reflections on the good old days — presenting stereo sound art at the local bar and grill. Ultimately, the discussion asks: in what way does the material dissemination of sound consitute the cultural dimensions of listening?