[PS2] Valkyrie Profile 2 Silmeria : can't find gameplay voices (Tri-Ace, Square Enix)

[Shiruba]

I wanted to have the japanese voice of this game but only found story voices and no gameplay voices so I'm asking here to see if someone know where they are.

I've extracted the iso (google is your friend) with https://www.bwass.org/bucket/triAce-PS2.c and this gives lots of files extensions : .000 / .010 / .020 / .bin / .crc / .dcm / .fas / .fis / .idx / .mc / .mcp / .mwo / .pk1 / .pk2 / .pk3 / .rma / .seq / .sle / .slz / .unk / .zls.

I provide a download link for the extracted files in case you don't want to extract the iso manually : https://mega.nz/file/pV8BADrZ#o4iNV6vtpotw4tb1HUPXlBVoWHydnWT32GdoskKFaFw

PSound seems to be able to extract voices from the .seq / .pk1 / .pk2 / .020 but as I said no gameplay voices were found. The total file size of these extracted seems to match the size of the iso file (~4.3GB) so I don't think there is any file missing. But I don't know where would they be.

Thanks for any help on this.