https://github.com/kode54/vgmstream/blob/master/README.md#vgmstream
A few extensions that vgmstream supports clash with common ones. Since players like foobar or Winamp don't react well to that, they may be renamed to make them playable through vgmstream.
.aac to .laac (tri-Ace games)
.ac3 to .lac3 (standard AC3)
.aif to .aiffl or .aifcl (standard Mac AIF)
.asf to .sng (EA games)
.flac to .lflac (standard FLAC)
.mp2 to .lmp2 (standard MP2)
.mp3 to .lmp3 (standard MP3)
.mp4 to .lmp4 (standard M4A)
.mpc to .lmpc (standard MPC)
.ogg to .logg (standard OGG)
.opus to .lopus (standard OPUS or Switch OPUS)
.stm to .lstm (Rockstar STM)
.wav to .lwav (standard WAV)
.wma to .lwma (standard WMA)
The main advantage to rename them is that vgmstream may use the file's internal loop info, or apply subtle fixes, but is also limited in some ways (like standard/player's tagging).