The story of electronic music and composition has, in recent decades, become a significant musical legacy. Seen by many as a novelty for a long time, the synthesiser and drum machine-derived pop of the late 1970s and early 1980s finally landed the squeals and squelches of solder and circuitry in the mainstream. Dave Henderson explores this long and exhaustive legacy and unearths the greatest albums, experiences and tunes from over a century of electronic sound.