Verified answer
Does the Digital Deluxe Edition include the soundtrack and artbook?
Quick answer
Yes. Steam, Xbox, and PlayStation list the original soundtrack and digital artbook among the Digital Deluxe contents. These are digital extras; the listings do not describe physical discs, printed books, or a boxed collector package.
What this means
Access and delivery can follow each storefront’s library and add-on rules. A soundtrack or artbook being included does not prove that it is supplied in a portable file format on every platform.
Official source
Steam — Digital Deluxe contents
Continue with the relevant guide
Open the related Control Resonant guide for the current topic summary, connected systems, and any later verified changes.
This answer is reviewed against pre-release official information. It states unknown boundaries explicitly and will be revised when Remedy or a first-party store publishes a newer fact.