This is not official in any way, recorded from the game running on a GBA. Sound quality is surprisingly good considering, full stereo, some background white noise.

Source: Gameboy Advance Audio Out
Ripper: .OGG files found on Winmx
Quality: 192kbps
Time: 40 minutes total
Size: 55.4 MB

File List
01 Title Screen
02 Background Story
03 Character Introduction
04 Opening Story
05 Willow o Wisp
06 Valencia Beach
07 Cave
08 Battle
09 Victory
10 Enigma Appearence
11 Boss Fight
12 Light of Plainfield Mimorette Forest
13 Event
14 Toruna Village
15 Benakoncha Ruins
16 Wakute Village
17 Inside Reimittsu Palace
18 Pippurusu Town
19 La Roche Tower
20 Kido Monga
21 Spirit Appearance

.NFO
SFV (for file verifying)