Depeche Mode are an English electronic music band formed in 1980 in Basildon, Essex. The group's original line-up consisted of Dave Gahan (lead vocals, occasional songwriter since 2005), Martin Gore (keyboards, guitar, vocals, chief songwriter after 1981), Andy Fletcher (keyboards) and Vince Clarke (keyboards, chief songwriter 1980–81). Vince Clarke left the band after the release of their 1981 debut album, Speak & Spell, and was replaced by Alan Wilder (keyboards, drums, occasional songwriter) with Gore taking over songwriting. Wilder left the band in 1995; Gahan, Gore, and Fletcher have since continued as a trio.