Sigma (Σ) is a British drum and bass duo consisting of Cameron Edwards and Joe Lenzie. They met at Leeds University at drum and bass nights. Their 2010 collaboration with DJ Fresh “Lassitude” peaked at number 98 on the UK Singles Chart. Their single “Nobody to Love”, a rework of Kanye West’s “Bound 2”, was released on 6 April 2014. It topped the UK Singles Chart, becoming not only their first top 40 single but also their first UK number one.