plays a role" and contains a "sonority and manner of phrasing which mirror the individuality of the performing jazz musician".

A broader definition that encompasses different eras of jazz has been proposed by Travis Jackson: "it is music that includes qualities such as swing, improvising, group interaction, developing an 'individual voice', and being open to different musical possibilities". Krin Gabbard argued that "jazz is a construct" which designates "a number of musics with enough in common to be understood as part of a coherent