Invisible System is the pseudonym for the UK & Africa producer Dan Harper whose music is an eclectic fusion of Ethiopian, dub, reggae, techno, trance, drum and bass, jungle, acid, psychedelic, folk, post-punk, goth and rock.They have played at the Addis Ababa Music Festival, Ethiopia. Endorset Festival, UK. Thimbleberry Festival, supported the UK band Dreadzone, Music Port Festival and Waveform Festival.