AC3Filter is an open source AC3 decoding filter that allows you to watch videos with AC3-encoded surround audio. The file I am using is available here: The Other Side, DTS-WAV, 44.1 KHz Before getting into the methods, I found it is important to have AC3Filter installed. For this guide I will be using a test file from Kelly Industries which specializes in high-end audio. DTS is available on DVDs, but not lossleess, and for this guide we will be playing back DTS-WAV files which have come from enhanced audio-CDs or from concert DVDs or DTS CDs. Introduction What exactly is a DTS file? DTS is a multi-channel, usually 5.1 or 7.1, home theater lossy encoded audio format created by Digital Theater Systems. Many softwares have issues playing these files back, but luckily there are a few that make it very easy. In this guide we will teach you how to playback DTS-WAV files that could have come from DTS CDs or enhanced audio CDs.