OED has 1929. M-W has 1927. 20 Dec. 1911 _Monessen(PA) Daily Independent 4?/3 <<Of course I was feeling tremendously encouraged and then I got to that awful chromatic scale from A to A, and he made a dreadful discord on the piano and said I was off key, and I wasn't--wasn't!" Kate beat her gloves on the chair enphatically.>>