In addition to elevating Sonny and Cher to major celebrities, it revived their recording careers.
In late 1928 he toured the South including New Orleans.
Under the director of legendary conductor Karl Bohm, King sang at Austria's Salzburg Festival in such roles as Florestan in Beethoven's Fidelio, the Emperor in Strauss's Die Frau ohne Schatten The Woman without a Shadow and Bacchus in Strauss's Ariadne auf Naxos.