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Post by liffy99 on Jan 27, 2015 9:21:17 GMT
Hope this is the right place for a Blu Ray question . . .
So, I'm curious about the ability to get high definition audio from Blu Ray discs. My understanding is that these are present on the discs in either Dolby True HD, Master DTS or sometimes stereo LPCM files. My question is how to get these to my digital input amplifier (no AV receiver here so any decoding would need to happen in a Blu Ray player).
Apparently, the True HD and Master files can carry up to 7.1 audio up to 24/192 and that plain 2 channel coax cabling to SPDIF does not have the bandwidth to carry all of that (it's limited to 24/192 stereo). So output needs to go via HDMI or 8 analogue connections. Sadly my digital amp has neither, being limited to 2 channel SPDIF or optical. So one question is whether any 'mixing down' of the 7.1 signal can be carried out at the player end and output as LPCM ?
Alternatively I assume it is much more straightforward to simply play a LPCM track direct from the Blu Ray disc which would be a straightforward stereo mix to start with. But can you choose that option easily (not having a Blu Ray player, other than a PS3 I don't know) ?
I'd love to try multi-channel playback but space precludes it really. Anyway I love what the Lyngdorf RoomPerfect system does for room acoustics correction - is there an AV receiver with similar capabilities ? The Essence Acoustics HDACC can handle this by the looks of things (although it's not an AV receiver) but lacks room correction.
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Post by John on Jan 27, 2015 16:57:36 GMT
I do not use a Cinema based system so cannot really help you around more than 2 channel set up. I use WAV or FLAC from my player not all DVD players will play both. You can also play direct from the DISC but it sounds better via file based IMO I tend to record files on SSD drive and use a Adaptor not a lead. Looking at your Lyndroff the unit seems to have all the connections covered so it a question of figuring out what you prefer or what suits the Blue Ray Player. Maybe someone like GAZ can help you out more
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Post by gazjam on Jan 27, 2015 19:38:48 GMT
Hope this is the right place for a Blu Ray question . . . So, I'm curious about the ability to get high definition audio from Blu Ray discs. My understanding is that these are present on the discs in either Dolby True HD, Master DTS or sometimes stereo LPCM files. My question is how to get these to my digital input amplifier (no AV receiver here so any decoding would need to happen in a Blu Ray player). Apparently, the True HD and Master files can carry up to 7.1 audio up to 24/192 and that plain 2 channel coax cabling to SPDIF does not have the bandwidth to carry all of that (it's limited to 24/192 stereo). So output needs to go via HDMI or 8 analogue connections. Sadly my digital amp has neither, being limited to 2 channel SPDIF or optical. So one question is whether any 'mixing down' of the 7.1 signal can be carried out at the player end and output as LPCM ? Alternatively I assume it is much more straightforward to simply play a LPCM track direct from the Blu Ray disc which would be a straightforward stereo mix to start with. But can you choose that option easily (not having a Blu Ray player, other than a PS3 I don't know) ? I'd love to try multi-channel playback but space precludes it really. Anyway I love what the Lyngdorf RoomPerfect system does for room acoustics correction - is there an AV receiver with similar capabilities ? The Essence Acoustics HDACC can handle this by the looks of things (although it's not an AV receiver) but lacks room correction. Ello there. Perhaps I can help. I bought my Oppo 103D bluray player primarily as a SACD/DVD-Audio disc player but wanted to use my own Young Dac to do the D-A processing, as it would be better than the Oppo internal Dac. I wasn't concerned with multi-channel to be honest, so not sure how helpful this actually is but you mention downmixing at the player end, which is something I have done with my bluray player. My Oppo outputs a DSD stream from SACD via one of its HDMI outputs, but as like yourself I didn't have an AV receiver with said input, I bought a box of tricks which strips out the HDMI audio and converts it to LCPM and outputs it to its coaxial or optical outputs. Highest bit/sample rate i can get from the box is 24/96 which is plenty for my needs. There are photos and some information on my Oppo sales thread HERE: theaudiostandard.net/thread/1064/withdrawn-sale-thread-bluray-player?page=1&scrollTo=26943The Oppo is withdrawn from sale (now a bluray movie junkie but the converter is up for sale, if its of any use? Ask away and if I can help (even with any non sales related stuff!) I'll do my best to answer. No idea about multichannel or the Lyngdorf RoomPerfect system I'm afraid.
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Post by liffy99 on Jan 28, 2015 12:54:44 GMT
Ah, 'tis a tangled web innit with everyone seemingly wanting to control what you can and can't do with software and hardware ! Thanks for the reply and I think I've reached the same conclusion - that an HDMI de-embedder to split out the high def audio is the way to go (I've found one that seems to tick the right boxes, is small, cheap at $50 and handles up to 192/24 in stereo or 5.1). However I don't think it will work on the end of an HDMI connection to my PS3 as I believe that player needs to see an 'HDMI handshake' from whatever it is connected to. The Oppo range (and some Pioneers and doubtless a few others) don't need to see such a handshake and are thus ideal for use with a de-embedder. Anyway, at the moment I don't have an AV Receiver (which would be the other option) and don't know of one that could offer the same quality of amplification that my Lyngdorf setup offers. So perhaps I'll be looking for an Oppo or similar soon. That said, I'm deeply suspicious of what is actually sold as high def music, even in Pure Audio blurays. For example, how can a recording mastered in the seventies (eg. Genesis) be capable of supplying enough resolution for a 24/192 standard ? My gut feeling is that such recordings are simply upsampled, adding nothing to the sound quality. Sure, there are companies like AIX that base their products on recording made with 24 bit gear but these will generally only cover more recent, often far less known, musicians. Maybe hi-def still has some way to go before a useable library exists. In the meantime I'll continue to keep an eye on the ITrax hi-def recordings as a more reliable source.
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Post by gazjam on Jan 28, 2015 14:38:37 GMT
Agree with you on "dubious" quality of HD music released. HD Tracks got their knuckles rapped on this one.
And honestly...anything above 24/96 is debatable whether its worth persuing anyway... For myself, I've been down this road and 24/96 is plenty.
Its all about the quality of the mastering for me. Have high bitrate MP3s of well mastered recordings that sound jaw dropping.
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Post by rallye666 on Mar 11, 2015 13:50:57 GMT
Agree with you on "dubious" quality of HD music released. HD Tracks got their knuckles rapped on this one. And honestly...anything above 24/96 is debatable whether its worth persuing anyway... For myself, I've been down this road and 24/96 is plenty. Its all about the quality of the mastering for me. Have high bitrate MP3s of well mastered recordings that sound jaw dropping. I've stopped worrying about so called 'quality' of the music I download. I realised I was spending to much time seeking out 24/192 where possible, and then discounting it if the DR database score was lees than 10!
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Post by MartinT on Mar 11, 2015 15:45:20 GMT
24/96 is as high as you need to go. Proper microphone placement and engineering/mastering are far more important than the exact data format.
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Post by Stratmangler on Mar 18, 2015 8:57:23 GMT
I've stopped worrying about so called 'quality' of the music I download. I realised I was spending to much time seeking out 24/192 where possible, and then discounting it if the DR database score was lees than 10! Is the DR database an indicator of quality? I've never once considered DR when buying music
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Post by MartinT on Mar 18, 2015 23:06:40 GMT
Nor me. It's of interest, of course, but would never stop me from buying music.
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Post by ChrisB on Mar 18, 2015 23:14:58 GMT
Why would you cut your nose off to spite your face? If music you're interested in is only available in a lower resolution format, would you really not listen to it at all? I've always said that lo-fi is better than no-fi!
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