The Quintessence of Chant (disc 1) Format: CD Country Code: US Label: Sony Vivarte Date: rec. 21-22 October 1995The Quintessence of Chant (disc 2) Format: CD Country Code: US Label: Sony Vivarte Date: rec. 21-22 October 1995Gregorian Chant Format: CD Country Code: US Label: Sony Vivarte Date: rec. 28-29 December 1992Ave Maris Stella Format: CD Country Code: DE Label: Sony Vivarte Date: rec. 2-5 November 1989Gloria in excelsis Deo Format: CD Country Code: US Label: Sony Date: rec. 1978 and December 1980Greatest Hits - Chant (b) Format: CD Country Code: US Label: Sony Date: rec. 2-5 November 1989Greatest Hits - Chant Format: CD Country Code: US Label: Sony Date: rec. 28-29 December 1992In Natali Domini Format: CD Country Code: DE Label: Sony Vivarte Date: rec. 27-29 July 1990Halleluja Format: LP Country Code: DE Label: Mediaphon Date: rec. 1976, 1978, 1980