On the nights of February 16 and 17, 1971, the first commercial quad recording sessions ever were held In San Francisco’s Grace Cathedral. This monumental edifice to God ‘s glory and Episcopalian financial acumen is blessed with a fine pipe organ, a 90-foot ceiling, and a 7-second reverberation time. The latter, in particular, put some stringent limitations on both the recording technique and musical style involved. The session was for side 2 of Paul Beaver and Bernard Krause’s new Warner Bros.
