stylistic features of summertime by gershwin

features that show influences1) blue notes- jazz music2) melody dominated homophony- classical3) female vocal style- classical (operatic)4) pentatonic scales- jazz music5) use of 7th chords- jazz and blues6) syncopation- jazz7) cross rhythms-8) strophic-folk9) blues sequence- blues10) portamento- jazz or blues11) false relations- impressionist12) orchestration- classical13) instrumental colour eg bells- impressionist14)chromatic harmonies- impressionist15) non-cadential progressions- impressionist16) parallel movement of minor 6th chords- impressionist17) whole tone scales- impressionist18) circle of 5ths- classical