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[haggis999]

Yesterday, I bought a new Oppo BDP-105 universal disk player to act as a general purpose media hub (it accepts both HDMI and USB inputs).

I have connected the NVidia graphics card in my PC to this Oppo via an HDMI cable. The NVidia HDMI audio driver tells me that it supports up to 8 channels, using encodings of AAC, DTS Audio, Dolby Digital or Dolby Digital Plus. It also supports bit depths of 16 or 24, with sampling frequencies of 44.1, 48.0 and 96.0kHz. I have configured the DSP setting in MC to reduce to 96kHz any input sampling rates above that limit. MC audio is set to Direct Sound and Bitstreaming via HDMI. The Channels option is set to 'Source number of channels'.

The HDMI input on the Oppo accepts Dolby Digital, Dolby Digital Plus, DTS, AAC, up to 5.1ch/192kHz or 7.1ch/96kHz PCM.

So far, only one of the audio and video files I have tested has refused to play. This is a rip of one of my commercial Blu-ray disks, which has a DTS-HD 5.1 Master Audio soundtrack. Trying to play this video generates the MC error "Something went wrong with playback...The audio format may not be supported by your hardware. You can use DSP Studio to change the output to a compatible format...". Is this perhaps because the NVidia driver only supports DTS Audio rather than DTS-HD Master Audio? If so, is there any way round this problem?

Another issue is that a couple of my other video recordings appear to be playing in 5.1 channel mode, as expected, but I am puzzled by MC's Audio Path display, which claims that both input and output are 2 channel (with no changes being made). How can it be 2 channel if I am getting sound from my centre and rear speakers?

David

[haggis999]

I appear to have solved both my issues by turning off bitstreaming in MC. Now my DTS-HD MA Blu-ray plays fine and Audio Path shows that 6 channels are in use.

During my initial experiments with trying to get multichannel sound via this new HDMI connection I hit some problems that were fixed by using bitstreaming. Whatever those problems might have been, they seem to have disappeared.

David

[fitbrit]

Do you have dtsdecoderdll.dll installed in your system? If not, you are just sending the regular DTS core, which is not lossless.