I'm running an Intel NUC with Intel HD4000 graphics in Windows 7 hooked up via HDMI to a Marantz SR9600 receiver. Of note, the receiver can accept only Dolby Digital, DTS, and up to 5.1 LPCM over HDMI.
I'm trying to play back a Blu-ray with a Dolby TrueHD 7.1 soundtrack, and I'm getting no audio and a slow, stuttery picture, which I know indicates a problem with audio out. Since I know XBMC can decode TrueHD, my goal is to get near-lossless 5.1 LPCM output, but this doesn't seem to be working.
What audio settings do allow for proper playback:
5.1 channels + Dolby & DTS support + WASAPI or DirectSound output results in 5.1 Dolby Digital sound.
7.1 channels + Dolby, DTS & LPCM support + WASAPI or DirectSound output results in 7.1 LPCM sound - however my amp cannot properly accept this and gets confused, so all I get is left/right channels played back (however picture is smooth and what audio I get sounds fine).
What does not work:
Selecting 5.1 channels + LPCM support + WASAPI output gives me a stereo PCM signal, no audio, stuttery picture.
Selecting 5.1 channels + LPCM support + DirectSound output gives me a 5.1 LPCM signal, but no audio, stuttery picture.
No change when selecting "boost on downmix".
So, long story short, it seems there's a problem taking a Dolby TrueHD 7.1 signal and downmixing it to 5.1 LPCM. If it reencodes it to Dolby Digital 5.1, no problem. If it does a straight decode to 7.1 LPCM, it seems there's also no problem.
Any suggestions?
I'm trying to play back a Blu-ray with a Dolby TrueHD 7.1 soundtrack, and I'm getting no audio and a slow, stuttery picture, which I know indicates a problem with audio out. Since I know XBMC can decode TrueHD, my goal is to get near-lossless 5.1 LPCM output, but this doesn't seem to be working.
What audio settings do allow for proper playback:
5.1 channels + Dolby & DTS support + WASAPI or DirectSound output results in 5.1 Dolby Digital sound.
7.1 channels + Dolby, DTS & LPCM support + WASAPI or DirectSound output results in 7.1 LPCM sound - however my amp cannot properly accept this and gets confused, so all I get is left/right channels played back (however picture is smooth and what audio I get sounds fine).
What does not work:
Selecting 5.1 channels + LPCM support + WASAPI output gives me a stereo PCM signal, no audio, stuttery picture.
Selecting 5.1 channels + LPCM support + DirectSound output gives me a 5.1 LPCM signal, but no audio, stuttery picture.
No change when selecting "boost on downmix".
So, long story short, it seems there's a problem taking a Dolby TrueHD 7.1 signal and downmixing it to 5.1 LPCM. If it reencodes it to Dolby Digital 5.1, no problem. If it does a straight decode to 7.1 LPCM, it seems there's also no problem.
Any suggestions?