The Midnight Edition includes a separate Digital Sound & Art Gallery. Konami lists 71 tracks in its music list and says the gallery includes over 100 pieces of artwork; the sound player is part of that separate application, not the main game executable.
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Digital Sound & Art Gallery
Konami says the Digital Sound & Art Gallery includes the music used in the game, with an in-app sound player, plus over 100 pieces of production artwork such as concept art and sketches. The product page lists 71 tracks. It is a separate application from the main game and is included in the Midnight Edition; availability may differ by store platform.
Official music list
Konami publishes the full track-title list on its official product page. This guide summarizes the gallery contents without reproducing the full soundtrack listing. Nintendo also lists the Digital Sound & Art Gallery separately for Switch.
Edition details
Compare Standard and Midnight in the edition guide. The price page is a dated US Steam snapshot; confirm your local store's current offer.