1000 hours of early jazz recordings freely available online MAR 11 2016
David W. Niven collected jazz records from as early as 1921 and with the help of the Internet Archive, copies of those records have been made available online...that's 1000 hours of jazz.
My 20-year-old cousin introduced me to jazz when I was 10. It was a 10" 78 RPM OK recording of "My Heart" made in Chicago on November 12, 1925, by Louis Armstrong's Hot Five with Kid Ory, trombone; Johnny Dodds, clarinet; Lil Armstrong, piano; and Johnny St. Cyr, banjo. On the reverse was "Cornet Chop Suey."