Professional ratings
Aggregate scores
Source	Rating
Metacritic	89/100
Review scores
Source	Rating
AllMusic
Alternative Press	8/10
Entertainment Weekly	B
The Guardian
NME	9/10
Pitchfork Media	9.5/10
Q
Rolling Stone
The Rolling Stone Album Guide
Spin	9/10

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.

After the album's positive reception in Australia, the duo considered an international release – its date was held back until 2001 in both the United Kingdom and North America and appeared in slightly altered forms. The delay and changes occurred so that the group could obtain permission to use the samples or use replacements. Five singles were released on the album, "Electricity", "Frontier Psychiatrist", "Since I Left You", "Radio" and "A Different Feeling". The group promoted the album by organizing headlining tours in Australia, Europe and the United States.

Since I Left You was received favourably by the critics. It peaked in the top 30 on the ARIA Albums Chart, number 12 in Norway, number eight on the UK Album Charts and, in the United States, at number ten on the Top Electronic Albums chart and in the top 40 on the Top Heatseekers chart. At the ARIA Music Awards of 2001 it won in three categories: Breakthrough Artist – Album and Best Dance Release, Producer of the Year for Bobbydazzler. The Avalanches won a fourth award, Breakthrough Artist – Single for "Frontier Psychiatrist". Since I Left You became one of the best reviewed albums of the 2000s. In October 2010, it was listed at No. 10 in the book, 100 Best Australian Albums.

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