Soul jazz
Soul jazz is a development of jazz incorporating strong influences from blues, soul, gospel and rhythm and blues in music for small groups, often an organ trio featuring a Hammond organ.
Overview
Soul jazz is often associated with hard bop. Mark C. Gridley, writing for the All Music Guide to Jazz, explains that soul jazz more specifically refers to music with "an earthy, bluesy melodic concept" and "repetitive, dance-like rhythms.... Note that some listeners make no distinction between 'soul-jazz" and 'funky hard bop,' and many musicians don't consider 'soul-jazz' to be continuous with 'hard bop.'"Roy Carr describes soul jazz as an outgrowth of hard bop, with the terms "funk" and "soul" appearing in a jazz context as early as the mid-1950s to describe "gospel-informed, down-home, call-and-response blues." Carr also notes the acknowledged influence of Ray Charles' small group recordings (which included saxophonists David "Fathead" Newman and Hank Crawford) on Horace Silver, Art Blakey, and Cannonball Adderley.