Dependencies for alsa (Linux only):

sudo apt install libasound2-dev libopus-dev libopusfile-dev

Dependencies for portaudio (Cross-platform):

Linux:

sudo apt install portaudio19-dev libopus-dev libopusfile-dev

Mac:

brew install portaudio opus opusfile

Windows MinGW64/MSYS2:

pacman -S mingw-w64-portaudio mingw-w64-opus mingw-w64-opusfile

Licence of these examples:

Public domain/Unlicensed