Playlist: https://www.youtube.com/watch?v=wMDw_3wJEcE&list=PL_eztCDu33iFtgbVGHADQ6FI6mXkJpNhf
Recorded with Audacity.
Screenshot taken ingame with free fly cam, "Debug Console Enabler" on http://www.nexusmods.com/witcher3/mods/28/?

Music that plays in Hindarsfjall while exploring the wilderness.

Will try to gather more unofficial tracks in extended form, stay tuned!

http://www.thewitcher.com/
http://www.gog.com/game/the_witcher_3_wild_hunt_preorder