Mark Ryder is an English electronic musician, producer and DJ.
He was in the group M-D-Emm, which formed in 1988 and consisted of Ryder, Dave Lee (a.k.a.
Along with his brother Mike James, also a producer, the duo have released records under several aliases.
As a solo artist, Ryder has released many records since 1990 under numerous aliases in the breakbeat hardcore, drum and bass, house and UK garage genres.
He was a crucial player in the beginnings of early house music, pirate radio and illegal rave parties in the early 1990s culminating in him running some of the biggest legal raves at Wembley under the name Ravalation.