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<blockquote data-quote="g0rsq" data-source="post: 651946" data-attributes="member: 106527">I am new to Mediaportal, and HTPC generaly, but as I understand:-You need to configure your soundcard to &quot;passthrough&quot; the digital (PCM) audio unchanged to the optical output.All the 5.1 etc. setting for your soundcard will decode the digital signal for playback on external speakers connected to the PC.I think most soundcards do this by default, hence no settings.You need to allow your AV amplifier to decode the digital signal for playback on speakers connected to the amplifier.Of course you can use the PC soundcard to do the decoding, and feed the decoded signal to the amplifier via a connection for each channel, but not via optical. Usually better to let the AV amp hardware decoders do the work.Most AV amplifiers with Dolby decoders indicate when they are docoding multichannel streams by a dolby indication, or sometimes &quot;locked&quot; appears.I dont know of any other way to verify you have correctly sent the digital signal to the amplifier, and it is correctly decoding all the channels.Sorry not a well qualified answer, so maybe someone will correct me, or add more to the response.Peter</blockquote>

[QUOTE="g0rsq, post: 651946, member: 106527"] I am new to Mediaportal, and HTPC generaly, but as I understand:- You need to configure your soundcard to "passthrough" the digital (PCM) audio unchanged to the optical output. All the 5.1 etc. setting for your soundcard will decode the digital signal for playback on external speakers connected to the PC. I think most soundcards do this by default, hence no settings. You need to allow your AV amplifier to decode the digital signal for playback on speakers connected to the amplifier. Of course you can use the PC soundcard to do the decoding, and feed the decoded signal to the amplifier via a connection for each channel, but not via optical. Usually better to let the AV amp hardware decoders do the work. Most AV amplifiers with Dolby decoders indicate when they are docoding multichannel streams by a dolby indication, or sometimes "locked" appears. I dont know of any other way to verify you have correctly sent the digital signal to the amplifier, and it is correctly decoding all the channels. Sorry not a well qualified answer, so maybe someone will correct me, or add more to the response. Peter [/QUOTE]

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