Soul Calibur audio driver.

[Squaresoft74]

I tried that too
I merged both left and right mono files for each musics in a single Pcm 44100Hz 16bits Stereo file with SoundForge.
But the game still load them with mono playback setting so the sound is all weird.
If anyone know about a patch or could help modifying the game *driver* to initialize the playback to stereo that would be awsome

[Da1m0n]

The sound driver is written to play back music in stereo from SEPARATE files for EACH channel. That's why you have separate monaural files for the left and right channel. Problem is, that works fine on the original GD-ROM, but a CDR just can't be read fast enough by the DC to play both files simultaneously (it's been tried), so for that reason the playback was left at monaural (I think they merged both channels into a single file each, and left it at that).
There was a web page with more details about this, unfortunately I don't remember where it was... Google might be your friend.