The bass plunges and thumps. The guitars buzz with electronic feedback.
Over a rocking drum beat, the voices of a group called The Electric Prunes float in breathy unison: "Kyrie eleison . . . Christe eleison."
So begins one of the most venture some of recent rock recordings, the Prunes' album-length performance of Mass in F Minor, a new Reprise re lease. Composed by Los Angeles Rec ord Producer David Axelrod, 34, the six-part Mass achieves a surprisingly successful blend of pounding rhythms, a "churchy" organ, raucous improvisations and echoes of medieval plainsong....