I'm trying to play the undubbed version of P3FES on the latest stable version (1.2.1 r5873) but I have terrible audio issues in almost any bgm and video.
The game itself does not lag and runs at 60fps, it's just the audio.
This is my configuration:
Windows 8.1 64bit
i5 2500k
Radeon HD6870
4gb RAM
can you show us your SPU2-X settings? Remember youtube videos just record the output at full speed, not really how it sounds, it could have sounded dreadful to the guy making the video.