Jazz is a sponge for outside sounds. Add another idea to it — say, European classical or gospel-inflected R&B music — and it absorbs, assimilating the sound into a new subgenre: like "third stream" or ...

As a jazz subgenre, soul-jazz began to flourish in the early 1960s. A groove-oriented style built from the bottom up, soul-jazz usually begins with the bass player: You take a strong bass line, ...