 In December 2010, Sigma and DJ Fresh released the single "Lassitude" featuring Koko as the fifth single from DJ Fresh's album "Kryptonite".The song became one of their first charting singles as it peaked at number 98 on the UK Singles Chart and number 11 on the UK Dance Chart.After the release of their late-2011 "Night & Day" EPs on their label, in 2012, Sigma toured the UK, Europe, Australasia and the United States.