1940s - Bebop music breaks away from traditional jazz structures.
1950s - Improvisational jazz, beat poetry and electronic sounds develop.
1960s - Psychedelic, symphonic and fusion rock artists spark new musical styles.
1970s - Multitrack recording elevates creative artists such as Pink Floyd.
1980s - New wave, hip hop, electronic and industrial music broaden the mainstream.
1990s - Alternative radio opens the door to a more creative commercial sound.
2000s - The internet elevates do-it-yourself home studio indie artists.
2010s - Indie music platforms help expand the number of online musical genres.