The .hack//SIGN Original Soundtrack 1 was composed entirely by Yuki Kajiura and released in North America with the LE version of the first SIGN DVD. It contains many of the more frequently used songs in the series, including the TV versions of the intro "Obsession" and the outro "Yasashii Yoake" both of which are performed by See-Saw. Several of the songs are sung by Emily Bindiger including "The World", "Fake Wings" and "Aura".