A singer named Paul Reischmann recorded St. Louis Blues with his Jazz
Babies in Austria of all places in the 1930's.In the first part of his
vocal he sings it in Louis Armstrong's style then abruptly switches to
a hi-de-ho Cab Calloway style call and response-him singing then
orchestra members responding.I think it is unusual for a singer to
imitate the singing style of Louis and then Cab on the same recording.
Also there is some very nice playing by the drummer using brushes.
You just have to hear this recording.This Paul Reischmann does one of
the wildest jazz vocals i have heard on record.Here is a link to the
recording at redhotjazz site:

http://www.redhotjazz.com/reischmann.html

Linda