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Here's the composer/arranger/orchestrator breakdown. I placed it here in case there was a cleaner way this should be affixed in the notes.

DISC 1:

Composer:

Yasunori Mitsuda: 1, 4
Motoi Sakuraba, Yasunori Mitsuda: 2
Motoi Sakuraba: 3, 8-11, 14-18, 22-25
Yuzo Koshiro: 5-7
Motoi Sakuraba, Masafumi Takada: 12
Masafumi Takada: 13
Noriyuki Iwadare: 19-21
Takahiro Nishi: 26
Hirokazu Tanaka: 27

Arranger:

Yasunori Mitsuda: 1, 4, 14-16
Yasunori Mitsuda, Motoi Sakuraba: 2
Motoi Sakuraba: 3, 8-11, 18, 22-25
Yuzo Koshiro: 5-7
Masafumi Takada: 12, 13
Motoi Sakuraba, Masafumi Takada: 17
Noriyuki Iwadare: 19-21
Takahiro Nishi: 26
Hirokazu Tanaka: 27

Orchestration:

Yasunori Mitsuda: 1, 4, 12, 14-16
Yasunori Mitsuda, Natsumi Kameoka: 2, 5, 10, 22
Natsumi Kameoka: 3, 6-9, 11, 17-21, 24, 25

DISC 2:

Composer:

Noriyuki Iwadare: 1
Motoi Sakuraba: 2-4, 12, 13
Yuzo Koshiro: 5-9, 11, 14, 15, 17
Yuzo Koshiro, Takahiro Nishi: 10
Motoi Sakuraba, Yuzo Koshiro: 16, 18-20

Arranger:

Noriyuki Iwadare: 1
Motoi Sakuraba: 2-4, 11-13, 17
Takahiro Nishi: 5, 6
Yuzo Koshiro: 7-9, 14, 15
Yuzo Koshiro, Takahiro Nishi: 10
Motoi Sakuraba, Yuzo Koshiro: 16, 18-20

Orchestration:

Yasunori Mitsuda: 1, 12, 13, 15
Natsumi Kameoka: 2, 3, 7, 9-11, 16, 18-20
Natsumi Kameoka, Yasunori Mitsuda: 8, 14

DISC 3:

Masafumi Takada: 1, 2, 4, 5
Yuzo Koshiro, Motoi Sakuraba: 3, 7
Masafumi Takada, Motoi Sakuraba: 6
Motoi Sakuraba: 8, 9, 16, 18-20, 22
Motoi Sakuraba, Yuzo Koshiro, Noriyuki Iwadare: 10, 17
Motoi Sakuraba, Noriyuki Iwadare: 11, 12, 14
Yuzo Koshiro: 13, 24
Hirokazu Tanaka: 15, 21, 23

Arranger:

Masafumi Takada: 1, 2, 4, 5, 6
Yuzo Koshiro, Motoi Sakuraba: 3, 7
Motoi Sakuraba: 8, 9, 18, 20
Motoi Sakuraba, Takahiro Nishi: 10
Motoi Sakuraba, Noriyuki Iwadare: 11, 12, 14
Yuzo Koshiro, Motoi Sakuraba, Takahiro Nishi: 13
Hirokazu Tanaka: 15
Noriyuki Iwadare, Natsumi Kameoka: 16
Yuzo Koshiro, Motoi Sakuraba, Noriyuki Iwadare: 17
Natsumi Kameoka: 19
Takahiro Nishi: 22, 23
Yuzo Koshiro: 24
?: 21 (Arranger's Romaji reading not listed in the booklet. Will work on scans in the coming days)

Orchestration:

Yasunori Mitsuda: 1, 2
Natsumi Kameoka: 3, 7-9, 11, 12, 14, 16, 18, 19, 22-24
Yasunori Mitsuda, Natsumi Kameoka: 4, 5, 17