Karaoke / Minus Track
A backing track is an audio recording on audiotape, CD or a digital recording medium or a MIDI recording of synthesized instruments, sometimes of purely rhythmic accompaniment, often of a rhythm section or other accompaniment parts that live musicians play along with or sing along to. Backing tracks enable singers and bands to add parts to their music which would be impractical or impossible to perform live, such as string section or choir parts which were recorded in the studio. A backing track can be used by a one person band (e.g., a singer-guitarist) to add any one or more of bass, drums and keyboards to their live shows without the cost of hiring extra musicians. A small pop group or rock band (e.g., a power trio) can use backing tracks to add a string section, horn section, drumming or backing vocals to their live shows.