The Human Equation

The Human Equation is the sixth album by Arjen Anthony Lucassen, released under the name Ayreon. It was released on May 25, 2004. As with other Ayreon albums, it features guest appearances from several musicians previously unrelated to the project, including James LaBrie of Dream Theater, Mikael Åkerfeldt of Opeth, Eric Clayton of Saviour Machine, and Devin Townsend, performing music arranged and written by Lucassen.
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