Encoded the entire series of Elfen Lied into high quality MKV h.264 format with English, and Japanese audio, along with English Subtitles as well. I used the Japanese Blu-Rays to encode this, then Synced the English audio and retimed the English subtitles to match the different video length. For playback all you need is the proper codec if you dont already have it. Combined Community Codec Pack (which I prefer) or the K-Lite Codec pack should give you all you need and more to play these back. You should be able to hear audio just fine if you have one of the mentioned codec packs above. If you cannot hear any audio and do not want to install a codec pack for some reason, then you do not have and need the nero aac audio codec. As of today it can be found here. http://www.nero.com/enu/company/about-nero/nero-aac-codec.php **SCREENSHOTS** http://imgur.com/a/HwjoS#0