Yes, this is an adaptation of Smokey Johnson's "It Ain't My Fault." The original version on NOLA Records was a local New Orleans hit in the 1960's; since then, the tune has become a standard for the brass bands of that city.
I'll give you the entire instrumentation: clarinet, alto sax, trombone, accordion, banjo, tuba and drums. This band has several albums and should be better known than they are, in my opinion.
I have no clue. Not even a spark.
Not many folks around here know about this band, which is one reason I included a track by them - to promote them a little.
Is this band still together?