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<blockquote data-quote="Lotsofjazz" data-source="post: 235452" data-attributes="member: 64243">You are right if you only have DTS and AC3 movies, but some movies do have Mpeg audio(like MP4 Movies specially encoded for play back on the Sony Playstation 3) and also most SD TV channels use Mpeg for audio, so this requires to have an AC3 encoder like ffdshow or AC3filter. Once encoded into AC3 you can set ffdshow or ac3filter to relay it to the spdif. With MPA set to SPDIF for AC3 and DTS, these signals are directly relayed to the SPDIF and passes the ffdshow filter untouched, to accomplish this you are right that the Mixer in ffdshow must be left&nbsp; unchecked, and the DTS and AC3 codec set to SPDIF, so it does not try not use the mixer first.So I have now two codecs for audio that work fine together.. MPA audio decoder as main decoder and and ffdshow audio decoder as postprocess. Without the MPA I could not get it right and was everything, exept DTS, downmixed to stereo. With XP I only used the AC3filter and managed to decode everything as it shoulkd, postprocessing with ffdshow was not necessary.. But with VISTA this apparently did not work anymore (dont ask me why)Yeah, after days of trial and error I learned a lot about codecs and what their settings exactly do <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool&nbsp; &nbsp; :cool:" loading="lazy" data-shortname=":cool:" /> Lots</blockquote>

[QUOTE="Lotsofjazz, post: 235452, member: 64243"] You are right if you only have DTS and AC3 movies, but some movies do have Mpeg audio(like MP4 Movies specially encoded for play back on the Sony Playstation 3) and also most SD TV channels use Mpeg for audio, so this requires to have an AC3 encoder like ffdshow or AC3filter. Once encoded into AC3 you can set ffdshow or ac3filter to relay it to the spdif. With MPA set to SPDIF for AC3 and DTS, these signals are directly relayed to the SPDIF and passes the ffdshow filter untouched, to accomplish this you are right that the Mixer in ffdshow must be left unchecked, and the DTS and AC3 codec set to SPDIF, so it does not try not use the mixer first. So I have now two codecs for audio that work fine together.. MPA audio decoder as main decoder and and ffdshow audio decoder as postprocess. Without the MPA I could not get it right and was everything, exept DTS, downmixed to stereo. With XP I only used the AC3filter and managed to decode everything as it shoulkd, postprocessing with ffdshow was not necessary.. But with VISTA this apparently did not work anymore (dont ask me why) Yeah, after days of trial and error I learned a lot about codecs and what their settings exactly do :cool: Lots [/QUOTE]

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