I can probably answer a bit of that without breaking NDA.
There's one extreme, when a score is orchestrated, performed by live musicians, wrapped up, and that's it. In Square Enix games most intros/endings are like that, all the way back to FF8.
The other extreme is when a score is sequenced/synthesized. Traditionally this comes from the methodology of getting music onto older consoles, where more often than not it was a specialized task realizing the composer's music on hardware, where each musical event would trigger a specific sound at a specific pitch (so this data could be ripped to MIDI-like formats). These are terrifically small compared to fixed, streaming audio files.
Even as late as the PS2, music in games could still opt to use a sequenced format. (This was then emulated pretty accurately by efforts like the PSF2 format). While the PS2 (and PSX, honestly) was perfectly capable of streaming audio, Square Enix stuck to this sequencing in a lot of their games, probably because the methodology was familiar to them. (KH2, FFX) But with the added power, more elaborate 'samples' started being used. For example, in KH2, the saxophone lines in Lazy Afternoons are an actual recording, triggered just like the rest of the instruments.
Skip forward to now, and sequenced music in games is very rare. However, it's not accurate to call them 'orchestrated', because while the music is streamed from a single file, that doesn't completely describe how the file was put together- e.g. if it was an orchestration in the traditional sense, or sequenced, except in a DAW instead of real-time by the game.
The benefit of that latter over the old method is that the person doing the sequencing is no longer limited to the console hardware, and has much greater control over how the end product sounds, since all the game does is play back a stream.
The downside however, of course, is that since it's a single file, you lose a lot of the neat tricks you could do when the music was being synthesized realtime. Sonic's speed shoes powerup is an easy example of this. Granted, there's been a lot of advances in implementing some form of interactivity into streamed audio files (western games pioneered a lot of this, although the music in these generally lend themselves better to moulding on the fly. FFXIII-2 also experimented a little with this)
Anyway, I digress. What I meant to say is that just because a soundtrack is in a streamed format (BBS specifically) doesn't automatically mean it was orchestrated. In most cases nowadays it's a mix of sequencing and live instruments, as budget dictates. (Even Jason Graves often uses his own custom sample libraries mixed in with live musicians for his soundtracks)
As to what we did in BBS, you'll just have to wait to find out :V.
Rage Awakened was touched up, but then again it was more a KH2FM track than a BBS track so that's not exactly a surprise!
Now I can have that awesome Ultimania and this nice remastered music collection. Oh, Amazon JP why didn't I know about you sooner?
