Another inspiration for much of Copland's music was jazz. Although familiar with jazz back in America—having listened to it and also played it in bands—he fully realized its potential while traveling in Austria: "The impression of jazz one receives in a foreign country is totally unlike the impression of such music heard in one's own country ... when I heard jazz played in Vienna, it was like hearing it for the first time." He also found that the distance from his native country helped him see the United States more clearly. Beginning in 1923, he employed "jazzy elements" in his classical music, but by the late 1930s, he moved on to Latin and American folk tunes in his more successful pieces. Although his early focus of jazz gave way to other influences, Copland continued to make use of jazz in more subtle ways in later works.