The 1970s were a decade of evolution and diversification, and many new genres and subgenres became popular, the most important ones being ...

• VARIOUS ROCK DERIVATES,
  such as hard rock, heavy metal, progressive rock, and glam rock for example,
• ELECTRONIC MUSIC,
  which was partly the result of the continued development of synthesizers,
• FUNK,
• PUNK,
• DISCO,
  which became very important in the mid-to-late 1970s, and
• HIP HOP,
  though it didn’t play a major role in that decade yet.

THE SEVENTIES WERE INNOVATIVE AND EXPERIMENTAL, WHICH LED TO A WIDER DIVERSIFICATION OF MUSIC.