Caldera was an American-based, short-lived project by Robert Margouleff and Malcolm Cecil (both on keyboards), who would form Tonto's Expanding Head Band later the same year. This project also includes Toby Saks on cello and John Atkins on harpsichord and other keyboards. Their released only one album, from 1970, fully titled 'Stabat Mater: A Moog Mass'. As it name suggests it's a conceptual album with sacral thematic - it's a mixture of Christian Contemporary Music and Progressive Electronic - with emphasis on 'classical' passages and Vocoder - in which the carrier is often a synth line, modulated with vocals singing Biblical renderings, often in Latin. The album was released in 1970. There are two different releases, the other one with band's name misspelled CALDARA and different cover, spinning on 45 rpm. Caldera is historical curiosity worth checking both because of an unusual blend of electronic music and contemporary Christian, as well as early Vocoder example combined with classical passages. 01 - The Mother Stood 02 - Who Is The Man 03 - Share With Me The Pain 04 - Virgin Of Virgin's 05 - Make Me Carry The Death Of Christ 06 - In Flames May I Not Be Burned 07 - Christ, When I Leave This Life LINK