Inside the install folder there is oalinst.exe which is the open al sound drivers. they should had been installed with the installer. But none the less, you can either run the oalinst.exe from the installed folder or grab them here. https://www.openal.org/downloads/
Sorry for the inconvenience. Those driver installations are the reason I went with an Installer to begin with. :)
Thanks for the tip, in the future I'll limit my distributions to portables only.