Punk rock (or simply punk) is a rock music genre that developed between 1974 and 1976 in the United States, United Kingdom, and Australia. Rooted in garage rock and other forms of what is now known as proto-punk music, punk rock bands rejected perceived excesses of mainstream 1970s rock. Punk bands typically use short or fast-paced songs, with hard-edged melodies and singing styles, stripped-down instrumentation, and often political, anti-establishment lyrics. Punk embraces a DIY ethic; many bands self-produced recordings and distributed them through informal channels.