When you think of jazz, most of us conjure up the smooth sounds of Kenny G, possibly Ray Charles and his woeful blues, or maybe the sultry tones of Diana Krall. But there are entire genres of jazz—styles that are important to our Nation’s history—that are unheard of by new generations of music fans. The classic styles of Dixieland, ragtime and stride are virtually lost to young listeners who aren’t being exposed to the “party music” that played during the 1890s to 1930s. From the age of 13, my father has been a classic jazz junkie so I grew up listening to this music. Blaring from our hi fi…