No HD audio passthrough with Intel NUC and Emotic MC-700

  • Hi,

    I own an Intel NUC5CPYH HTPC and an Emotiva MC-700 processor.

    With Windows 10 installed on the NUC and Kodi installed from the Windows Store, everything works fine, including HD Audio passthrough.

    However, with the exact same hardware setup, when I try to use LibreElec, everything works fine except that there is no HD Audio passthrough. Dolby Digital and DTS are the only options available when selecting Audio passthrough. Sync playback to display option in player settings is disabled.

    Here is a log extract which seems to show that the Emotiva MC-700 annouces correctly its HD audio capabilities.

    17:54:22.117 T:139744365401856 NOTICE: Device 4

    17:54:22.117 T:139744365401856 NOTICE: m_deviceName : hdmi:CARD=PCH,DEV=0

    17:54:22.117 T:139744365401856 NOTICE: m_displayName : HDA Intel PCH

    17:54:22.117 T:139744365401856 NOTICE: m_displayNameExtra: EMO MC-700 on HDMI

    17:54:22.117 T:139744365401856 NOTICE: m_deviceType : AE_DEVTYPE_HDMI

    17:54:22.117 T:139744365401856 NOTICE: m_channels : FL, FR, LFE, FC, BC, BL, BR, FLOC, FROC, BLOC, BROC, TFC, TC, TFL, TFR, UNKNOWN1

    17:54:22.117 T:139744365401856 NOTICE: m_sampleRates : 32000,44100,48000

    17:54:22.117 T:139744365401856 NOTICE: m_dataFormats : AE_FMT_S16NE,AE_FMT_S16LE,AE_FMT_RAW

    17:54:22.117 T:139744365401856 NOTICE: m_streamTypes : STREAM_TYPE_AC3,STREAM_TYPE_DTSHD,STREAM_TYPE_DTSHD_MA,STREAM_TYPE_DTSHD_CORE,STREAM_TYPE_DTS_1024,STREAM_TYPE_DTS_2048,STREAM_TYPE_DTS_512,STREAM_TYPE_EAC3,STREAM_TYPE_TRUEHD

    I made the test with both versions 8.95.2 BETA and 8.2.5

    Any idea why HD audio passthrough does not work?

    Thanks,

    Philippe