The Human Equation

《The Human Equation》는 2004년 5월 25일에 발매된 에이리온의 음반이다.

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전체 작사: Arjen Anthony Lucassen except where noted. 전체 작곡: Lucassen

CD 1
#	제목	Vocals (in order of appearance)	재생 시간
1.	〈Day One: Vigil〉	Arjen Anthony Lucassen, Marcela Bovio	1:33
2.	〈Day Two: Isolation〉	James LaBrie, Mikael Åkerfeldt, Eric Clayton, Irene Jansen, Magnus Ekwall, Heather Findlay	8:42
3.	〈Day Three: Pain〉 (Lucassen/Devin Townsend)	Devon Graves, LaBrie, Devin Townsend, Findlay	4:58
4.	〈Day Four: Mystery〉	Lucassen, Bovio, Jansen, LaBrie, Ekwall, Findlay, Graves	5:37
5.	〈Day Five: Voices〉	Ekwall, LaBrie, Clayton, Findlay, Åkerfeldt	7:09
6.	〈Day Six: Childhood〉	Graves, LaBrie, Åkerfeldt	5:05
7.	〈Day Seven: Hope〉	Lucassen, LaBrie	2:47
8.	〈Day Eight: School〉 (Lucassen/Townsend)	Åkerfeldt, LaBrie, Townsend, Graves, Ekwall, Clayton, Jansen	4:22
9.	〈Day Nine: Playground〉 (Adaptation of Edvard Grieg's "Morning Mood")	instrumental	2:15
10.	〈Day Ten: Memories〉	Lucassen, Bovio, Ekwall, Findlay, Jansen, Clayton	3:57
11.	〈Day Eleven: Love〉	LaBrie, Findlay, Jansen, Ekwall, Graves, Åkerfeldt, Bovio	4:18
총 재생 시간			50:20

CD 2
#	제목	Vocals	재생 시간
12.	〈Day Twelve: Trauma〉	Clayton, Åkerfeldt, Graves, Jansen, Ekwall	9:54
13.	〈Day Thirteen: Sign〉 (Lucassen/Heather Findlay)	Findlay, Bovio, LaBrie, Lucassen	4:47
14.	〈Day Fourteen: Pride〉	LaBrie, Ekwall, Clayton	4:42
15.	〈Day Fifteen: Betrayal〉	Åkerfeldt, Graves, Clayton, Jansen, LaBrie	5:24
16.	〈Day Sixteen: Loser〉 (Lucassen/Townsend)	Mike Baker, Townsend	4:46
17.	〈Day Seventeen: Accident?〉 (Lucassen/Devon Graves)	Clayton, Bovio, Graves, Jansen	5:42
18.	〈Day Eighteen: Realization〉	Clayton, LaBrie, Jansen, Ekwall, Findlay, Graves, Åkerfeldt, Lucassen, Bovio	4:31
19.	〈Day Nineteen: Disclosure〉	Lucassen, Bovio, Findlay, Jansen, LaBrie	4:42
20.	〈Day Twenty: Confrontation〉	Lucassen, LaBrie, Bovio, Findlay, Graves, Jansen, Clayton, Ekwall, Åkerfeldt, Peter Daltrey	7:03
총 재생 시간			51:41

DVD (Special and Deluxe editions)
#	제목	재생 시간
1.	〈Inside〉 (behind the scenes)	45:27
2.	〈Concept〉 (the concept of The Human Equation)	3:05
3.	〈Drums〉 (Ed Warby's drums)	3:32
4.	〈Video〉 (videoclip of "Day Eleven: Love")	3:49
5.	〈Teaser〉 (teaser trailer)	1:28
총 재생 시간		57:25