OpenGameArt.org sources included in this library (CC0 / attribution optional):

1) NES Shooter Music (5 tracks, 3 jingles)
   https://opengameart.org/content/nes-shooter-music-5-tracks-3-jingles
   Author page notes attribution is completely optional.
   Files converted from WAV to Ogg Vorbis for this library.

2) Free NES Music Pack
   https://opengameart.org/content/free-nes-music-pack
   License: CC0
   See also OpenGameArt-Free-NES-Music-Pack-readme.txt when present.
   Selected WAV tracks converted to Ogg Vorbis for this library.
