African-American music is an umbrella term covering a diverse range of musics and musical genres largely developed by African Americans. Their origins are in musical forms that arose out of the historical condition of slavery that characterized the lives of black Americans prior to the American Civil War. The modern genres of blues and ragtime were developed during the late 19th century by fusing European musical styles (characterized by diatonic harmony within the framework of equal temperament) with those of African origin which employed the natural harmonic series and blue notes. The exceptions are hip hop, house and techno, which were formed in the late 20th century from earlier forms of African-American music such as funk and soul.