Tenacious D is an American comedy rock duo consisting of Jack Black and Kyle Gass. They write their own songs which showcase Black's vocal delivery and Gass' guitar playing. Their debut album was released in 2001 through Epic Records and achieved platinum status. While the duo performs primarily, their album and live shows feature backing bands including members of Foo Fighters and Phish. They have also released a film and television show. The music industry faces many challenges like piracy, changing revenue models, and the death of albums, but some companies are trying new strategies like instant song releases and music-based apps and games to engage fans.