"The problem turned out to be a classic case of synesthesia. ... Although Leinsdorf’s performance of the “Valkyries” was rhythmically in synch with Solti’s, at this moment Leinsdorf had emphasized the strings in his orchestral balance, whereas at that same point Solti had chosen to emphasize the brasses, which—I realized now only in retrospect—were responsible for synergizing that wonderful acid blue of the ocean. In Leinsdorf’s recording, the strings were soft and pillowy, and as a result the blue looked dead: The chemistry of the image and sound worked against each other to the detriment of both."
If only we could hear both edits and compare.