[78-L] huge snare backbeat 1945 at Viennese Ball 2014

[Joe Scott]

The closest thing to an out-and-out rock and roll sound I know of before 1946 would be beginning at 3:28 here:
http://www.youtube.com/watch?v=qeGd3O1pU9Q http://www.youtube.com/watch?v=qeGd3O1pU9Q&lang=en 
That was recorded by Buddy Johnson in November 1945. That was one of the tunes Buddy's band was playing at the Savoy in NY that year, too. As of 1945 sax and piano like that (which is sax and piano like 1957) were already common, and using backbeat that prominently for that much of a blues tune extremely, extremely uncommon (but Lionel Hampton was doing it in Oakland in 1944).
Joseph Scott