context: In Joel Makiver’s book, the band is described as a pioneer of nu metal. Korn laid the foundation for music that combines grunge, hardcore punk and groove metal, to which funk and hip hop are often added. After more than 3 million copies of their debut self-titled album, released in 1994, were sold worldwide, Korn became one of the best-selling heavy bands in the last decade, and more than 10 million copies of their debut album, Nielsen SoundScan, were sold worldwide in 2013. . The discography of the group 12 studio albums, the acoustic album MTV Unplugged and many collections with unreleased, live recordings or covers.
question: How many Korn nu metal albums have been released so far?
answers.text: 12