Famous song from "Porgy and Bess", written by George Gershwin (1898-1937) in 1935.
(how strongs are mums who still believe in the future when everything is down ! )
I still have fun with the Saint-Omer CC organ : The natural tremolo "wurlitzers" this organ !
So, this is a Jazzaillé-Coll organ now !
No sound editing, just the "tremolo" on...