The Jump King Quest Original Soundtrack has just been updated with an added high-quality/lossless-compression .wav version! You can opt in/out of downloading the higher quality files in your steam settings (Select Steam int he top navigation -> Settings -> Music -> Toggle "Download high quality audio files").
The soundtrack is included in the Deluxe bundle for Jump King Quest but can also be purchased separately. We will also be uploading the Soundtrack to our youtube channel just like we did with the original Jump King's soundtrack!
/Nexile Crew
JUMP KING QUEST Original Soundtrack
Edit: The high quality depot had not been correctly added to both the separate soundtrack and pre-price drop packages when this was posted, but this has now been fixed. Note that you may need to toggle the hq setting and restart steam and/or reinstall the soundtrack for Steam to properly update with the lossless files.