The Theater Equation is a 2016 live album and DVD/BluRay by Arjen Anthony Lucassen's progressive rock/metal rock opera project Ayreon. The Theater Equation consists of a live performance, with cast, choir and small orchestra, of the 2004 album The Human Equation. It marks the first time an Ayreon album was played live entirely, and the first Ayreon live release.
Arjen Anthony Lucassen
James LaBrie
Marcela Bovio
Jermain van der Bogt
Mike Mills
Magnus Ekwall
Irene Jansen
Heather Findlay
Eric Clayton
Anneke van Giersbergen
Devon Graves
Peter Jan Moltmaker
Nienke Verboom
Katinka van der Harst
Anita van der Hoeven