Since I Left You is the debut studio album by Australian electronic music group The Avalanches, released on 27 November 2000. It was issued on Modular Recordings and produced by The Avalanches' members Robbie Chater and Darren Seltmann (under the pseudonym Bobbydazzler). The album uses sampling extensively, containing an estimated 3,500 samples from various genres of music. The album was created in two separate near-identical studios by Chater and Seltmann, exchanging audio mixes of records they sampled.