Acoustic rock is a genre of music that combines elements of rock, folk, country, blues, and pop. Acoustic rock songs typically feature acoustic guitars, vocals, drums, bass, and sometimes keyboards or other instruments. Acoustic rock emerged in the 1960s and 1970s as a reaction to the electric guitar-dominated rock music of the time. Some of the pioneers of acoustic rock include Bob Dylan, Neil Young, Simon and Garfunkel, and The Beatles. Acoustic rock reached its peak popularity in the 1990s with artists such as Nirvana, Oasis, Pearl Jam, and Alanis Morissette. Acoustic rock songs often have catchy melodies, emotional lyrics, and a raw and intimate sound.