All the BGMs seem to be chopped after 1min 25sec. I've tried playing the .oma files extracted within Atrac folder in SonicStage. All .oma tracks with individual length displayed longer than 1min 25sec always stop playing at 1min 25sec. The movie's audio longer than 1min 25sec is working fine and is played till the end of the track, though the playback is not smooth during emulation. (I've tried rev 2452/2477/2482/2492, both 32 & 64 bit, but the same problem persists)
About the first Free Quest at chapter 2, I can finish it without any problem in rev 2477. EDIT: All tested 64 bit JPCSP crashes randomly, when 32 bit seems running smoothly so far.
This game's graphics is really nice. It is much more enjoyable to play it within JPCSP rather than PSP, with much higher resolution and larger screen. Hope the problems get fixed soon.
Enabled Settings:
Use shaders
Enable saving GE screen to Textures instead of Memory
Ignore invalid memory access
Use Media Engine
Extract media files to tmp folder
Decode audio files with SonicStage
Antialiasing x8