Derived from Hardbop, Soul Jazz is perhaps the most popular Jazz style of the 1960's. Improvising to chord changes, as with Bop, the soloist strives to create an exciting performance. The ensemble of musicians concentrates on a rhythmic groove centered around a strong but varied bassline.
Horace Silver had a large influence of style by infusing funky and often Gospel drawn piano vamps into his compositions. The Hammond organ also gained mass attention as the flagship instrument of Soul Jazz.