The prefix 'ALT' is commonly used in music genres to denote alternative versions of a genre. For example, ALT-rock is an alternative version of rock music, and ALT-country is an alternative version of country music. ALT-folk is an alternative version of folk music, and ALT-metal is an alternative version of metal music. ALT-pop is an alternative version of pop music, and ALT-hip hop is an alternative version of hip hop music. ALT-jazz is an alternative version of jazz music, and ALT-blues is an alternative version of blues music. ALT-electronic is an alternative version of electronic music, and ALT-classical is an alternative version of classical music.