Rock pop music may be a kind of common music with an impressive vocal melody usually instrument dominant by guitar, drums, and bass. Several types of rock music additionally use keyboard instruments like organ, piano, mellotron, and also, later, synthesizers. Some different instruments also commonly used like harmonica, harp, violin (for example in some art/classic rock band as Kansas) , flute (trademark of Ian Anderson of Jethro Tull, Peter Gabriel of Genesis and some others), banjo, melodica, timpani, etc. Rock pop music normally encompasses a sturdy back beat, and infrequently revolves round the guitar. They could be solid electrical, hollow electrical, semi hollow or even acoustic guitar.