There are two artists using the name; One is a Toronto-based DJ and the other is an indie-rock band based in Malmö, Sweden. Sek is a Toronto based Dubstep DJ. He formerly used to spin techstep/drum and bass. The "Moodstep" mix was probably from that era. He now runs Sub:trac, which is Toronto's leading Dubstep promoter.

Read more about Sek on Last.fm.