After the heavy saturation of blues performing in the 1920s and the application of various elements– rhythm, syncopation, call and response, lyrics, and so on– to avant-garde literature, Black and white, of the time, the country descended into a prolonged Depression in the 1930s. Blues recording ground nearly to a halt for several years, though conditions that fed into the blues were in ample supply. The music was changing with the amalgamation of swing band elements and boogie-woogie with the rural blues, producing a jumping hybrid that used blues structures and lyrics with a big-band lilt. The move to the Left, especially in the artistic community, found literary blues having a decidedly Leftist feel in writers such as Langston Hughes, holding over from the twenties and Frank Marshall Davis emerging in the thirties. There were still the musical artists from various genres, including classical, who made use of the blues, and movies, for example, reflected the music as well. It was a new kind of hot music– and thus, hot music literature– that was in the offing.