Most rock music is in 4/4 time, with a heavy backbeat
Instruments usually included electric guitar, electric bass, drums, keyboards and vocals
Distorted electric guitars, using additional effects such as delay, chorus and wah-wah
The rise of the guitar hero - guitarists who combined playing riffs with long, virtuosic, improvised solos
Although there is much more emphasis on instrumental sections, songs often follow a conventional verse-chorus structure
Lyrics have a darker mood than standard pop music lyrics