How to install VoxWare MetaSound Audio CoDec : - Uncompress the files from "VoxWare_MSA_CoDec.zip" archive, right-click on the "voxacm.inf" file and select Install. - You may encounter a prompt saying: "The software you are installing for this hardware... has not passed Windows Logo testing..."; click on the Continue Anyway button. - "voxacm.inf" file can be hidden; find out how to show hidden files from here (Windows XP users) or here (Windows 9x/Me users).