The invention and introduction of electrically amplified instruments – most notably the guitar and steel guitar – began slowly transforming every branch of pop music beginning in the mid- to late '30s, shifting emphasis in bands from an ensemble approach to one that allowed for sharper sound definition and easily heard instrumental solos, all of which made the world, at least the recorded version of it, more defined and, well, louder. For the Western swing, honky tonk, and country genres, the change came when steel player Bob Dunn went electric with his group Musical Brownies in 1935.