It's a short and interesting article, discussing the music and sound effects of Soul Calibur IV.
Throughout the entire series, the background music has always sounded orchestral-like; however none of the music was ever performed by a real orchestra. We’ve created a Hybrid Orchestra Sound system that encapsulates the power and rhythm in the game that a real orchestra cannot achieve.
Interesting, indeed. Though, I could have sworn the Soul Calibur III music was, at least, partially orchestrated, if I correctly remember what I saw on the DVD. I'll check on that later.