Un-Rock is a genre of rock and roll that evolved from psychedelic rock music first played by bands like Pink Floyd. By early 2005, there was enough analog and digital technology so that intricate and complex FX could be layered during live performances and recordings over guitar, live drums, bass guitar, vocals, or any other combination of instruments without the use of pre-recordings or computers. There is a heavy indie rock influence in this type of music. The guitar sound can range from clean to fuzz to heavy distortion. The drums are live and use a deep driving kick. The melodies tend to be simple with few chord changes. It can range from down tempo to punk rock fast. This type of music is considered to be the trip-hop of rock and roll. Sam Oak of Unfamiliar Occurrence helped shape the sound of this genre of music by getting inspired by bands like Wilco, Nirvana, Pink Floyd, and Arcade Fire.