Matthew J. Saunders (born 5 January 1972) is an English composer, mastering engineer, and visual designer. During the first decade of the 21st century he was signed to 4AD Records — a British major independent label home to The Pixies, Cocteau Twins, Scott Walker and many others. He records and performs as Magnétophone, The Assembled Minds, Rapid Eye Electronics Ltd. and also runs the record label Patterned Air Recordings.