How to setup foobar2000 with the vgmstream component to play and extract the audio files from GTFO
Download and install foobar2000
Download and open vgmstream foobar component
Open foobar2000 and choose File > Add Folder
Find and add the following folder:
~\Steam\steamapps\common\GTFO\GTFO_Data\StreamingAssets\GeneratedSoundBanks\Windows
Open the SoundbanksInfo.xml in a text editor to see what audio files the game uses
In foobar2000 search for the file id with Ctrl + F
Double click the audio to listen to it
In foobar2000 right click a track
Choose Convert > Quick Convert
Choose an output setting and click Convert
Select an output path and save