The Sagebrush Troubadour (1935)
The Sagebrush Troubadour is a 1935 American Western film directed by Joseph Kane and starring Gene Autry, Barbara Pepper, and Smiley Burnette. Written by Oliver Drake and Joseph F. Poland, the film is about two Texas Rangers traveling undercover as western troubadours in search of the killer of an old, half-blind man.
More at Wikipedia.