"Blue Door Green Sea" featured three songs – "'S Muladach Mi", "The 45 Revolution/Reel For Drambuie" (a version of a piece recorded by Swan and Bennett for a Drambuie whisky advertisement) and a new dance mix of “Seinn O!” from the debut album. It was well received, with New Musical Express tagging it as "smart 'n' bad-assed music of the 21st Century" and Billboard describing Mouth Music's continued fusion of music as "a global formula that works ... in all a wonderful record that deserves all the attention getting." The EP also reached number 1 in both the CMJ New Music Chart and the Billboard World Music Chart.