Gershon Kingsley may be a footnote to a footnote, but sometimes those end-of-page annotations put it all into focus. Kingsley penned one of the earliest synth-pop hits, "Popcorn" and collaborated with Jean-Jacques Perrey on moog and tape-loops compositions that became rarities favored by the Beastie Boys and Beck. But Kingsley's music was much more than bleepy ditties for dance parties and commercials. His interest in new music and new sounds led him naturally to the moog, a machine that promised to pack an orchestra into a keyboard-equipped box. It was Kingsley's own radical outlook that led him to designing Shabbat for Today and The Fifth Cup, two incredibly rare examples of devotional synth music. These rock-gospel--inspired treatments of Jewish ritual attempted to answer the call since time immemorial to Make Judiasm Relevant for Kids by incorporating funky beats and far-out sonics. It may sound dated today, but only to about 1997. The bleeps and whirs are familiar enough to fans of Air, Beck, and vintage pornos. The jarring parts are the earnest declarations by what must have been a very hip (or just hippy-dippy) cantor. The archeological value of this set -- it's two discs, featuring Kingsley's two long-form albums and a disc of assorted liturgical weirdness -- is fascinating, reminding us that the energy to radically revision faith and Jewish tradition was present in every generation.