SGNL>05 is an EP released by Isis which acts as an extension to their earlier full-length album Celestial, as the tracks were all directly culled from the Celestial recording sessions.
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The band has performed a version of the song "Celestial" live several times which fuses the original song and this remix together into a massive 16-minute rendition titled "Celestial (Ext/Alt)" on the Live.02 LP.