This is vgmstream, a library for playing streamed (pre-recorded) audio from video games.
Some of vgmstream's features:
Latest development is here: https://github.com/vgmstream/vgmstream/
Automated builds with the latest changes: https://vgmstream.org/downloads
Common releases: https://github.com/vgmstream/vgmstream/releases
Help can be found here: https://www.hcs64.com/
There are multiple end-user bits:
Main lib (plain vgmstream) is the code that handles internal conversion, while the above components are what you use to actually get sound.
See components in usage guide for install instructions and explanations. The aim is feature parity, but there are a few differences between them (due to missing implementation in vgmstream's side, or lack of support in target player/API/etc).
You should get
vgmstream-win.zip (bundle of various components) or
foo_input_vgmstream.fb2k-component (installable foobar2000 plugin) from the
latest pre-built binaries:
You can also try getting them from the (infrequently updated) releases: https://github.com/vgmstream/vgmstream/releases
If the above links fail you may try alt, recent-ish versions here: https://github.com/bnnm/vgmstream-builds/raw/master/bin/vgmstream-latest-test-u.zip
You may compile them from source as well (see build guide).
Generally you need to build vgmstream's components manually (see build guide). For
a quick build call
./make-build-cmake.sh (for Debian/Ubuntu-style distros, installs
various deps first so you may prefer to call commands manually).
Follow the build guide instructions. You can probably use Linux's script above with some tweaks.