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Just a note: you want to look into using SPDIFER (http://ac3filter.net/projects/spdifer) instead of ffdshow audio decoder if you`re sending all AC3/DTS through SPDIF straight out to your receiver. When I was using ffdshow audio decoder, I found it was re-encoding all AC3/DTS audio to Dolby Digital 5.1 format 48kHz/640kbps. I know this because my Yamaha receiver indicates the incoming sample and bit rates. So for example, if I was playing an x264 movie that was DTS 48kHz/1536kbps, it would be sent over SPDIF to my receiver as DD5.1 48kHz/640kbps. Similarly, a DD5.1 48kHz/448kbps audio stream would be sent to my receiver over SPDIF as DD5.1 48kHz/640kbps.

I finally figured out that ffdshow audio decoder was the culprit and since replaced it with SPDIFER and my sound quality is also better now (true to the source).

I love ffdshow for video decoding, and use nothing else, but SPDIFER or AC3Filter is the way to go for SPDIF audio output.

<blockquote data-quote="damaster" data-source="post: 223708" data-attributes="member: 60795">Just a note: you want to look into using SPDIFER (<a href="http://ac3filter.net/projects/spdifer" target="_blank">http://ac3filter.net/projects/spdifer</a>) instead of ffdshow audio decoder if you`re sending all AC3/DTS through SPDIF straight out to your receiver.&nbsp; When I was using ffdshow audio decoder, I found it was re-encoding all AC3/DTS audio to Dolby Digital 5.1 format 48kHz/640kbps.&nbsp; I know this because my Yamaha receiver indicates the incoming sample and bit rates.&nbsp; So for example, if I was playing an x264 movie that was DTS 48kHz/1536kbps, it would be sent over SPDIF to my receiver as DD5.1 48kHz/640kbps. Similarly, a DD5.1 48kHz/448kbps audio stream would be sent to my receiver over SPDIF as DD5.1 48kHz/640kbps.I finally figured out that ffdshow audio decoder was the culprit and since replaced it with SPDIFER and my sound quality is also better now (true to the source).&nbsp; I love ffdshow for video decoding, and use nothing else, but SPDIFER or AC3Filter is the way to go for SPDIF audio output.</blockquote>

[QUOTE="damaster, post: 223708, member: 60795"] Just a note: you want to look into using SPDIFER ([url]http://ac3filter.net/projects/spdifer[/url]) instead of ffdshow audio decoder if you`re sending all AC3/DTS through SPDIF straight out to your receiver. When I was using ffdshow audio decoder, I found it was re-encoding all AC3/DTS audio to Dolby Digital 5.1 format 48kHz/640kbps. I know this because my Yamaha receiver indicates the incoming sample and bit rates. So for example, if I was playing an x264 movie that was DTS 48kHz/1536kbps, it would be sent over SPDIF to my receiver as DD5.1 48kHz/640kbps. Similarly, a DD5.1 48kHz/448kbps audio stream would be sent to my receiver over SPDIF as DD5.1 48kHz/640kbps. I finally figured out that ffdshow audio decoder was the culprit and since replaced it with SPDIFER and my sound quality is also better now (true to the source). I love ffdshow for video decoding, and use nothing else, but SPDIFER or AC3Filter is the way to go for SPDIF audio output. [/QUOTE]