Drum and bass (also written as "drum 'n' bass" or "drum & bass"; commonly abbreviated as "D&B", "DnB" or "D'n'B") is a genre and branch of electronic music which emerged from rave and jungle scenes in England during the early 1990s. The style is often characterized by fast breakbeats (typically 160–180 beats per minute with heavy bass and sub-bass lines, sampled sources, and synthesizers. Tempo is typically 174.00 BPM.