A style of the Rock genre, Post-Hardcore evolved of the Hardcore scene, with artists combining the driving energy of the Hardcore genre with stronger melodies and more complex song structures. In the early days, Post-Hardcore bands were musicians from Hardcore bands with new vocalists who sang more than they screamed. The music in this style is aggressive, but not meant to be abrasive. The vocals bounce back and forth between singing and screaming. There is a wide span of interpretation on this style, but the energy and core elements remain unchanged.