The first interracial sound recording was made in 1909 by Polk Miller & the Old South Quartette, on the Edison label. It was released as a four-minute cylinder phonograph record. Mr. Miller played the banjo and sang the verses and the Quartette sang harmony on the refrain.
Polk Miller was a Confederate veteran who liked Southern music, and the Old South Quartette was all freedmen. They disbanded the Quartette in 1913 when Polk Miller thought that racism was too dangerous to the safety of his friends, who (for safety's sake) went anonymous.
The Old South Quartette disappeared, and only resurfaced c. 1928, in Harlem, where they had picked up jazz music and were singing that presumably in nightclubs but also on QRS Records (famous for QRS player piano rolls but also for some 78rpm discs) instead of preserving 19th-century Negro songs & Confederate marching music. Mark Twain himself had loved their early recordings, they were billed as an American sensation, and I think Polk Miller's peaceful retirement & the O.S.Q. finding a future in the cultural hub of Harlem is a very happy ending to this most American story of friendship and old music!
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Your neurodiverse (Aspie) score: 134 of 200
Your neurotypical (non-autistic) score: 72 of 200
You are very likely neurodiverse (Aspie)