Reidemeister Move is Christopher Williams, contrabass, and Robin Hayward, tuba, a duo dedicated to exploring and expanding the possibilities of sustained-tone music in just intonation for their instruments. Hayward’s self-designed microtonal tuba developed together with the instrument manufacturers B & S, and Williams’ previous work with Charles Curtis and LaMonte Young’s legendary Theatre of Eternal Music, provide the backbone for a performance practice based on purely tuned intervals, noise, corporeal rhythms, and spatial resonance. Borromean Rings (2011) 35-40 minutes. Acoustic. Arcanum 17 (2012) 43 minutes. With 8.1-channel electronics.