The title of this duo improvisation refers to the source of instruments employed. That is, their inventors wield them. Hans Reichel plays the daxophone, an instrument that is in essence a shaped metal blade locked onto a wooden block, vibrated with a bow or plucked, alternately. Ganesh Anandan, a multi-instrumental percussionist, concentrates on his shruti stick and metallophone. The former is a stringed instrument resembling a dulcimer, but prepared to a scale outlined by Harry Partch. The latter is a gamelan-style system of metal bars played with a hammer. The duo’s interplay is dynamic and sure-footed, quickly finding rhythms and tones that cooperate to great result. Reichel’s daxophone fills in for woodwind phrasing and the human voice equally, with both shrill and diaphragm-rattling waves. Anandan finds resonant tones that unlock paths for melody and rhythm. It is exoticism and interplay at their surprising best.