Just so there's no confusion, the tier system is a bit complicated with physical vs digital rewards. To be clear, it seems that there are no digital rewards for the physical tiers so you can't get physical + digital, which is kind of sad really. But for the $100 physical tier it doesn't explicitly mention that the soundtrack is included. Actually, it says the digital soundtrack download is NOT included. However, on the spreadsheet, its description states that the soundtrack IS included in the box you'll get. This was left out of the tier description itself, so if you go for the physical $100 tier know that you ARE getting the soundtrack as well.
This messed me up. I'm sure that I made things more confusing somehow, but there you are lol.
Yes, MI -- I, too, was a little confused/concerned that they did not explicitly include the physical soundtrack in the text description for the $100 tier. They only mentioned the 'audio clips'.
Hopefully they will explain it more thoroughly / in better detail in a future update.