Add N to (X) were a three-piece British band specializing in electronic music performed on analogue synthesizers, formed in London in 1994.

The original band members were Andrew Aveling, Barry Smith (aka Barry 7) and Ann Shenton. Steven Claydon replaced Aveling in 1997.

After several releases on small labels, they turned down offers from major labels and signed to large independent label Mute Records in 1998, and achieved a modest commercial success before splitting in 2003.

Several of their songs and video clips have been adult/sex-related; the video for "Metal Fingers in My Body" is an animated short featuring a woman having sex with a robot, and their video for "Plug Me In" is famous for featuring porn actresses playing with sex toys.