No audio - MKV file

Hello, the video for this MKV file plays fine but there is no sound, anybody know why?

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How is your WD hooked up?  HDMI?  Optical?   Analog?

Hooked up with HDMI cable


Video
ID/String                        : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format_Profile                   : High@L3.0
Format_Settings_CABAC/String     : No
Format_Settings_RefFrames/String : 1 frame
CodecID                          : V_MPEG4/ISO/AVC
Duration/String                  : 1h 51mn
BitRate_Nominal/String           : 1 600 Kbps
Width/String                     : 960 pixels
Height/String                    : 540 pixels
DisplayAspectRatio/String        : 16:9
FrameRate_Mode/String            : Constant
FrameRate/String                 : 29.970 fps
ColorSpace                       : YUV
ChromaSubsampling                : 4:2:0
BitDepth/String                  : 8 bits
ScanType/String                  : Progressive
Bits-(Pixel*Frame)               : 0.103
Encoded_Library/String           : x264 core 80 r1378+57 6f6b50a
Encoded_Library_Settings         : cabac=0 / ref=1 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=0 / wpredp=2 / keyint=250 / keyint_min=25 / scenecut=40 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=1600 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default/String                   : Yes
Forced/String                    : No

Audio
ID/String                        : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format_Profile                   : Main
CodecID                          : A_AAC
Duration/String                  : 1h 51mn
Channel(s)/String                : 2 channels
ChannelPositions                 : Front: L R
SamplingRate/String              : 44.1 KHz
Compression_Mode/String          : Lossy
Default/String                   : Yes
Forced/String                    : No

I removed header compression, still no audio.

If you hook up through HDMI, make sure you select AUTO on AUDIO selection, otherwise the WD may be trying to send un-decoded AAC to the receiver which probably doesn’t support it.

Hey, thanks for your replies, my hookup is the WDTV to the television with an HDMI cable, no external speakers/receiver hooked up, for audio I have -stereo- selected, I played the video with HDMI pass through (auto) selected still no audio, audio works fine when playing on the PC, I guess I will just convert the audio to mp3.