There were important quality advances in recordings specifically made for radio broadcast. In the early 1930s Bell Telephone Laboratories and Western Electric announced the total reinvention of disc recording: the Western Electric Wide Range System, "The New Voice of Action". The intent of the new Western Electric system was to improve the overall quality of disc recording and playback. The recording speed was 33 1⁄3 rpm, originally used in the Western Electric/ERPI movie audio disc system implemented in the early Warner Brothers' Vitaphone "talkies" of 1927.
When was the Western Electric System introduced?
early 1930s