A co-release with Dinzu Artefacts, clarinetist John McCowen continues his investigation into the physical possibilites of the clarinet family, here on contrabass clarinet for four fully acoustic recordings of continuous tones and unexpected aural phenomena through circular breathing while generating intense harmonics and multiphonics of earth-shaking ferocity.

Two clarinetists--John McCowen, also the composer, and Madison Greenstone, both on clarinet & bass clarinet--taking the title from Boethius' (427-524 AD) printed work on ancient Greek music: "De institutione musica", as they generate long-form drones using the harmonic interactions and interference patterns of similar tones, overtones, and difference tones; impressively intense.