Itzhak Perlman proudly called himself a "fiddler" to reinforce that he's doing the same thing as klezmer musicians. Yo-Yo Ma plays with non-traditional musician

Itzhak Perlman proudly called himself a "fiddler" to reinforce that he's doing the same thing as klezmer musicians. Yo-Yo Ma plays with non-traditional musicians, too. So yeah; violin and cello don't make it "classical."