The Rainbow
1929
The Rainbow is a 1929 American synchronized sound pre-Code Western film directed by Reginald Barker and starring Dorothy Sebastian, Lawrence Gray and Sam Hardy. While the film has no audible dialog, it was released with a synchronized musical score with sound effects using both the sound-on-disc and sound-on-film process. The soundtrack was recorded using the Tiffany-Tone process using RCA Photophone equipment. Wikipedia