Jazz rock

Jazz rock is the combination of jazz and rock, as you might expect. It emerged from rock musicians bringing in ideas from jazz - certain chords and chord progressions, different instrumentation and, most notably, improvisation - and mostly incorporating that into rock structures. There are roughly two types of jazz rock:

• Jazz Rock, the form of Art Rock
• Jazz Rock, the form of Progressive Rock

Jazz Rock is Not Jazz Fusion

First, we have something to get out of the way: jazz rock is not jazz fusion.

	Jazz Fusion	Art Rock Jazz Rock	Prog Rock Jazz Rock
Composition	Pieces roughly conform to bop composition, using head sheets, or sometimes diverge quite greatly; there are rarely lyrics because there are rarely vocalists	Art rock jazz rock songs deviate little from pop rock composition but rely on jazz chords; lyrics are not usually any different from regular art rock lyrics	Prog rock jazz rock songs are often focused mostly on the soloing but just resemble longer rock songs; if there are lyrics, they are usually no different from art rock lyrics
Arrangement and Instrumentation	Performers are usually playing traditional jazz instruments but with amplification and sometimes effects; pianos are often replaced by more contemporary keyboards	Traditional jazz instruments (horns, normally) are often incorporated	One or more traditional jazz instruments may get a solo, but often these bands incorporate jazz soloing without jazz instruments
Production	Fusion sometimes differs greatly from traditional jazz, making use of rock overdubs and editing techniques, though not all fusion bands do this	Roughly similar to art rock	Solos are sometimes stitched into songs a la prog rock