听了两三年 Jazz 了，需要系统性的学习一下。
https://en.wikipedia.org/wiki/Jazz
Jazz
Jazz is a music genre that originated in the African-American communities of New Orleans, Louisiana, in the late 19th and early 20th centuries. Its roots are in blues, ragtime, European harmony, African rhythmic rituals, spirituals, hymns, marches, vaudeville song, and dance musi…
