The primary instrumentation of the hard bop era was features of the era, which began in the late 1950s, included aggressive drumming, the combination of blues and bebop vocabulary, and the influence of gospel and r& b genres.

What were the two factors that lead to Jazz being the primary musical medium of popular culture in the early 20th century? The use of the term Jazz was controversial when it was fairly new.

the style of music that was composed during the classical era was concerto grosso.