apollo 440 (also known as apollo four forty or @440) are an english electronic music group formed in liverpool in 1990. the group has written, recorded, and produced five studio albums, collaborated with and produced other artists, remixed as apollo 440 and as ambient cinematic alter-ego stealth sonic orchestra, and created music for film, television, advertisements and multimedia. over eleven years, they notched up eleven top-forty uk singles with three top-tens, and had a chart presence worldwide.