I've had the Blu-Ray disc not be able to play on an OPPO BDP-93 and a DENON Blu-Ray player.
Edit: Got it to play on a Sony Blu-Ray disc player. Unfortunately every track except for one had an audio gap in the middle of it. The time of the gap did not correspond to the beginning or end of the track, nor was there a consistent time between the gaps. If I didn't know better I'd say the old DVD-Audio buffer fill problem had made it to Blu-Ray.
BTW, the OPPO reports Unknown Disc and the DENON reports No Disc. Multiple tries on both.
Here's a strange thing - If I leave the disc in the OPPO, sometimes the OPPO continues to show "Loading" and then if you hit "Open", the disc will not be ejected. If you then press the front standby button (on/off button), and the turn the OPPO back on, the disc will then start playing. No silence gaps in the middle of the gaps either. This is really feeling like bad programming but I'll get a replacement from Amazon to be sure.
One interesting thing was that the audio rates on the Sony showed a few peaks above 10 and 11 mbps, which is above the DVD-Audio spec (and I thought above what 5.1-channel 96kHz TrueHD should give).
Not to be mean, but how can you compare the two in a sony? They do not do dvd audio.One interesting thing was that the audio rates on the Sony showed a few peaks above 10 and 11 mbps, which is above the DVD-Audio spec (and I thought above what 5.1-channel 96kHz TrueHD should give).
I haven't tried the Oppo yet, but it played in a much older Panasonic...with a very slight gap/glitch/dropout in one song (I already have forgotten which). I've sucked the bits into the computer and converted to FLAC, hopefully I'll soon have a chance to see how that plays.Got it to play on a Sony Blu-Ray disc player. Unfortunately every track except for one had an audio gap in the middle of it. The time of the gap did not correspond to the beginning or end of the track, nor was there a consistent time between the gaps. If I didn't know better I'd say the old DVD-Audio buffer fill problem had made it to Blu-Ray.
not really only DVD-AThat's correct.
What I wrote was that the Sony (from the BD) is showing an audio bitrate of over 10 mbps at certain peaks including one that hit just above 11 mbps. TrueHD uses the same (or similar) MLP encoding scheme as found on a DVD-Audio disc. However, on a DVD-Audio disc the maximum peak allowed is roughly 9.8 mbps because of the limitations of the DVD disc.
However, on a DVD-Audio disc, 9.8 mbps is sufficient to get a lossless 5.1-channel 96/24 output. So, my curiosity was why would a Blu-Ray disc need a higher bitrate than that? After all, you can't get "better" than lossless given a fixed bitrate and bit-depth.
Otto, that was my point. Even though BD has a bigger bandwidth, why is it needed since MLP (and TrueHD uses MLP) produces a lossless 96/24 5.1-channel output at 9.6 mbps? Those extra bits aren't really needed for 96/24 5.1-channel lossless. You can't make it "more lossless" by adding extra bits. - they don't carry any extra information over 9.6 mbps max MLP.not really only DVD-A
9 mbps is a bandwidth of data can be read from DVD disc.
6 channel of PCM @96/24 on average contains 13 mbps data.
that's why was developed PPCM(MLP) compression, which allows to write/read data to/from disc
within DVD specification with following uncompression by the player into full 13mbps stream.
BD as of today has bandwith @ 72 mbps
No, that's incorrect. Uncompressed 5.1-channel, 96kHz, 24-bits is 13,824,000 bits per second. Never approached that and if it were uncompressed, then the bitrate would be (or should be) a constant number. Only MLP causes the bitrate to vary. So, there is no way that was the cause.The whole point of MLP is in it's name - Lossless Packing. The audio bitrate of 5.1 channels of uncompressed 96/24 audio is somewhere around 11.5mb/sec. The maximum data transfer rate of DVD is about 9.6mb/sec. What MLP is doing is losslessly compressing the 11.5mb/sec audio stream so that it comes out at less than 9.6mb/sec, just like FLAC does with audio files on your computer, obviously with each using their own proprietary lossless codec. This is the major reason the DVD-A format was even invented, because it's impossible to fit 5.1 96/24 uncompressed audio within the DVD-V spec.
If your amp is telling you that you're getting 11.5mb/sec from an MLP source, it's most likely the 'unpacked' data rate, ie after the MLP has been un-MLP'ed.