The soundboard recording resided with engineer Ed Wolfram until being unearthed in 1996.
The live soundboard recording was released as a teaser prior to the release of the band's yet untitled forthcoming record.
He added that the coveted soundboard recordings would be on the site and available for listening in the next few days.
Only a few recent concerts have been made available because of difficulties accommodating "tapers" and obtaining soundboard recordings.
The two-track soundboard recording features all original band members including late guitarist Michael Houser.
According to the Vitamin Party website the band has put together a live album compiled of soundboard recordings from a number of different shows.
In December 2009, the band began releasing 2-track soundboard recordings of various archived shows.
Most of them derived from audience tapes, though a few (such as Destroyer) were sourced from soundboard recordings.
This live album is unique for Isis in that it is a soundboard recording taken from a single live performance.
This consisted of many live soundboard recordings from over the years as well as various demo recordings.