Drone metal is a style of metal composed with heavy repetitive drones, minimalist structure and slow tempos. It is largely influenced by drone music, as well as noise music and dark ambient. The primary instrument of the genre is the electric guitar, typically in deep sub-bass tones, usually heavily distorted using audio feedback and/or reverb. As drone metal often lacks traditional rhythmic structure, use of percussion instruments is less common than most metal genres. Read more on Last.fm.