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<blockquote data-quote="JonL" data-source="post: 191533" data-attributes="member: 58025">I'm having this same problem.&nbsp; Playing files in MPC, WMP, Zoom, etc. (external) Graphedit shows filename.mp4(h264/5.1 AAC, for example)-&gt;ffdshow Audio Decoder-&gt;AC3Filter-&gt;Audio Switcher-&gt;Default DirectSound Device.&nbsp; I have 3 HTPCs using this method with MCE and I get full 5.1 DD over SPDIF passthrough to my external receiver on all 3.&nbsp; I've used this method for over a year.&nbsp; I'm basically decoding MP3 stereo and AAC 5.1 to 16-bit integer for AC3Filter so that it can transcode it to 5.1 640kbps AC3 and send it over SPDIF.I have set MP to use ffdshow and DirectSound in the Movies configuration and have made no other changes (but have tested with many between both ffdshow and AC3Filter).&nbsp; What Graphedit shows me when playing the same file using MP's internal player is filename.mp4-&gt;ffdhsow Audio Decoder-&gt;DirectSound Device.&nbsp; It is not sending to AC3Filter-&gt;Audio Switcher which is responsible for the AC3 transcoding.&nbsp; I'm getting analog 2-channel at my receiver sent over SPDIF.&nbsp; I have audio, but it's not acceptable.I've been through this forum backwards and forwards and have tried all the suggestions/workarounds/band-aids suggested and none get me much closer.&nbsp; I'm no the only one experiencing this, so is it being worked on?&nbsp; There has to be a problem in the way the internal player is handling audio in relation to codecs.If this were fixed, I'd switch immediately.</blockquote>

[QUOTE="JonL, post: 191533, member: 58025"] I'm having this same problem. Playing files in MPC, WMP, Zoom, etc. (external) Graphedit shows [I]filename.mp4[/I](h264/5.1 AAC, for example)->ffdshow Audio Decoder->AC3Filter->Audio Switcher->Default DirectSound Device. I have 3 HTPCs using this method with MCE and I get full 5.1 DD over SPDIF passthrough to my external receiver on all 3. I've used this method for over a year. I'm basically decoding MP3 stereo and AAC 5.1 to 16-bit integer for AC3Filter so that it can transcode it to 5.1 640kbps AC3 and send it over SPDIF. I have set MP to use ffdshow and DirectSound in the Movies configuration and have made no other changes (but have tested with many between both ffdshow and AC3Filter). What Graphedit shows me when playing the same file using MP's internal player is [i]filename.mp4[/i]->ffdhsow Audio Decoder->DirectSound Device. It is not sending to AC3Filter->Audio Switcher which is responsible for the AC3 transcoding. I'm getting analog 2-channel at my receiver sent over SPDIF. I have audio, but it's not acceptable. I've been through this forum backwards and forwards and have tried all the suggestions/workarounds/band-aids suggested and none get me much closer. I'm no the only one experiencing this, so is it being worked on? There has to be a problem in the way the internal player is handling audio in relation to codecs. If this were fixed, I'd switch immediately. [/QUOTE]

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