Some say South Africa's rock 'n roll scene has flatlined, but it's about to get its heartbeat back. Cape Town retro rock band Taxi Violence is gearing up for a nostalgic, high-energy performance at Oppikoppi, one of the country's biggest music festivals.The Limpopo shindig, celebrating its 21st birthday at Northam this weekend, will bring together some top local and international acts for a weekend dedicated to the love of music.Taxi Violence, which has been on the scene for more than a decade, has been a headline act at Oppikoppi before. Despite having had some success in the past, the band had a break while rock 'n' roll experienced a lull.Guitarist Rian Zietsman said: "When we started there was an upsurge in rock. Now it seems people are geared more towards electronic dance music and indie, which means the rock scene is not particularly vibrant."With the return of one of the band's bass guitarists, Jason Ling, its appearance at 'Koppi will be the first time in a long time that it does so as a five-piece band.Fans are guaranteed that Taxi Violence, which has been preparing for the release of its much-anticipated new single later this year, will go all out to bring its A-game.Hip-hop royalty AKA and house legend DJ Black Coffee will also be at Oppikoppi , as will US acts Brand New and Gogol Bordello, among a host of other artists .Aware of the pressure to re-ignite rock 'n' roll, Ling says the set will not only be "high-impact" but also "old-fashioned " rock .The real question is whether rock is still relevant, especially with the rise in South Africa of music genres such as pop, hip-hop and dance music.Often mistaken as a kwaito band, Taxi Violence agrees that, although the local rock scene is on a bit of a downer, there is still room for its music...