Ray Bay wrote: >Stereo was invented in 1954 by the Fletcher boys... Sorry but that's wrong. Stereo was invented in the 1930s, in England, at EMI, by Alan Blumlein. There are stereo recordings from 1937 made by him to prove it. Read: The Inventor of Stereo: The life and works of Alan Dower Blumlein by Robert Charles Alexander There is also a 1944 Berlin recording of Bruckner's 8th conducted by Karajan which has a fourth movement recorded in stereo so the Germans were at it around the same time. However, I too doubt a 1955 stereo Ring. Tony Duggan, England. Mahler recordings survey: http://www.musicweb.uk.net/Mahler/