Catherine Christer Hennix

Selected Early Keyboard Works features three pieces of minimal music, performed by Hennix on tunable electric keyboards. ''Mode Nouvelle Des Modalités'', for well-tuned just intonation Fender Rhodes and sine wave drone, is a consummate expression of Hennix's formative years, a probing meditation giving the mercurial quality of early electronic music an instrumental life replete with the dexterity of Cecil Taylor and shades of Paul Bley's synthesized reveries. ''Equal Temperament Fender Mix'', performed on the same Rhodes but in twelve-tone equal temperament tuning, employs a tape delay system not unlike that used famously by Terry Riley, here towards more somber, hallucinatory means. Hennix is joined by Hans Isgren for the collection's centerpiece, ''The Well-Tuned Marimba'', for well-tuned Yamaha, sheng, sine wave, and live electronics. Using the same approach and just intonation keyboard featured on Hennix's The Electric Harpsichord, but with marimba in place of harpsichord stops, the piece is an undulating marvel of lysergic drone, equally deserving of its companion's status as ''THE obscure masterpiece of the days of the early American minimalism''. Now accessible for the first time, these recordings only begin to fill gaps of silence from a figure whose work has until recently remained flickering at the margins of some of the most enduring cultural developments of the 20th century.