If you do not have a bundled code, the safest "link" is the official Microsoft Store listing. Search for "DTS Sound Unbound" and purchase the "DTS:X Decoder" add-on. This ties the license directly to your Microsoft Account—no manual code entry required.

DTS Sound Unbound is a fantastic tool for unlocking spatial audio on Windows, but the digital-only licensing model can be confusing if you are expecting a traditional "product key."

To ensure smooth usage of the DTS Sound Unbound software, users should:

If your hardware included a physical card or manual with a code, you must redeem it directly in the Microsoft Store app (under your profile icon > "Redeem code or gift cards").

This is the standard method for most users.