CommentOctet (T1 Panpipes, T2 Piano, T3 Tone Switching Guitar, T4 Tone Switching Guitar, T5 Double Baass, T6 Bass Drum, T7 Snare Drum, T8 Cymbal) This is an original mix of the Velvet Room (Aria of the Soul) and final boss (Battle for Everyone's Souls) themes
https://www.vgmusic.com/music/console/sony/ps2/P3_-_The_Battle_F