Influential Canadian outfit Delerium are set to release their new album Rarities & B-Sides on April 21, 2015. The album is comprised of previously unreleased tracks and remixes spanning the last 15 years. The album includes 3 brand new singles that recently resurfaced from the stacks, “Glimmer” featuring Emily Haines (of Metric) premiered earlier this year on EDM.com, “Ray” which was a b-side off previous album Music Box Opera and “Aurora” an un-earthed instrumental that turned into a collaboration with vocalist Rykka.