This is an interesting and well-executed remaster of the Castlevania III soundtrack. The music from Akumajou Densetsu (悪魔城伝説) and CV3 are mixed together, with the goal of getting the best of both worlds.
It was created by Kirby Pufocia in December of 2014, and can be downloaded here:
https://kirbypufocia.bandcamp.com/album/cviii-no-densetsu-or-whatever
I normally don't prefer hardware-inaccurate representations of classic game soundtracks, but this take on the soundtrack does a great job of looking at the pros of each version and trying to implement them.
I included the piano display from VirtuaNES of the original Famicom and NES versions, to help visualize some of the differences between the two soundtracks (and how this mix pulls from both of them).
01. 00:00 Prelude
02. 01:42 Epitaph
03. 02:30 Prayer
04. 02:42 Beginning
05. 04:39 BOSS FIGHT
06. 05:47 Stage Clear
07. 05:53 Destiny
08. 06:26 Clockwork
09. 07:55 Mad Forest
10. 09:28 Anxiety
11. 11:39 Rising
12. 13:25 Stream
13. 14:43 Dead Beat
14. 16:16 Nightmare
15. 17:50 Encounter
16. 18:32 Aquarius
17. 20:03 Demon Seed
18. 21:35 Deja Vu (Vampire Killer)
19. 22:38 Riddle
20. 24:07 Pressure
21. 24:45 Overture
22. 26:49 Big Battle
23. 28:09 Bigger Battle
24. 29:26 All Clear!
25. 29:36 Evergreen
26. 30:43 Flashback
27. 31:56 Ooooops!
28. 32:00 Game Over
If you'd like to know more about the VRC6, check out our podcast episode on it!
https://soundcloud.com/retrogameaudio/the-vrc6