 Radio stations that made white and black forms of music available to both groups, the development and spread of the gramophone record, and African-American musical styles such as jazz and swing which were taken up by white musicians, aided this process of "cultural collision".The immediate roots of rock and roll lay in the rhythm and blues, then called "race music", and country music of the 1940s and 1950s.Particularly significant influences were jazz, blues, gospel, country, and folk.