Through thoroughgoing investigations of the physical properties of the saxophone, John Butcher has come to a deep understanding of projecting the instrument's ordinarily quiet, internal sounds. And through a practice more road-worn than academic, Andy Moor has developed a distinct talent for isolating the otherwise explosive sounds of the electric guitar. The two meet in the middle of the road, so to speak, for this quick half-hour session of maxed-out microtones. It's an excitingly subdued and intense listen, and while it's laudable not to follow the compulsion to load the disc to its 80-minute capacity, the one track that stretches past 10 minutes suggests there's much more ground left for them to cover.