OK so finally i have found that all AC3 5.1 channel audio plays correctly from all speakers, but AAC 5.1 channel audio doesnt. Im reproducing the medioinfo files below. Hope u can help!
AC3 5.1 channel that works:
General
Unique ID : 189745115073083367697470423622819352046 (0x8EBF9473CE19D31AB2071725E5BD8DEE)
Complete name : H:\Movies\English\Surround 5.1 Channel\Dark Skies 2013 720p BRRip x264 AC3-JYK\Dark Skies 2013 720p BRRip x264 AC3-JYK.mkv
Format : Matroska
Format version : Version 2
File size : 2.17 GiB
Duration : 1h 37mn
Overall bit rate : 3 199 Kbps
Encoded date : UTC 2013-05-07 16:41:14
Writing application : mkvmerge v6.1.0 (‘Old Devil’) built on Mar 2 2013 14:32:37
Writing library : libebml v1.3.0 + libmatroska v1.4.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 37mn
Bit rate : 2 750 Kbps
Width : 1 280 pixels
Height : 544 pixels
Display aspect ratio : 2.35:1
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.165
Stream size : 1.82 GiB (84%)
Writing library : x264 core 130 r2273 b3065e6
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=24 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=3 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=0 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=5 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=2750 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=62500 / vbv_bufsize=78125 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
Default : Yes
Forced : No
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 1h 37mn
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 311 MiB (14%)
Language : English
Default : Yes
Forced : No
Menu
00:00:00.000 : en:00:00:00.000
00:04:21.470 : en:00:04:21.470
00:08:22.210 : en:00:08:22.210
00:14:43.716 : en:00:14:43.716
00:18:52.131 : en:00:18:52.131
00:24:34.014 : en:00:24:34.014
00:29:52.916 : en:00:29:52.916
00:36:28.144 : en:00:36:28.144
00:40:32.430 : en:00:40:32.430
00:45:40.404 : en:00:45:40.404
00:52:14.548 : en:00:52:14.548
00:59:41.244 : en:00:59:41.244
01:05:08.196 : en:01:05:08.196
01:11:59.482 : en:01:11:59.482
01:17:07.248 : en:01:17:07.248
01:22:48.172 : en:01:22:48.172
01:29:07.050 : en:01:29:07.050
01:33:03.244 : en:01:33:03.244
AAC 5.1 channel that doesnt work
General
Unique ID : 195821436930759474652630550580859061511 (0x9351D63FFB67B2A493E9015846F54507)
Complete name : H:\Movies\English\Alexander Revisited The Final Cut 2004 720p BRRip x264 RmD (HDScene Release)\Alexander Revisited The Final Cut 2004 720p BRRip x264 RmD (HDScene Release).mkv
Format : Matroska
Format version : Version 2
File size : 2.98 GiB
Duration : 3h 33mn
Overall bit rate mode : Variable
Overall bit rate : 1 999 Kbps
Encoded date : UTC 2011-04-15 09:27:59
Writing application : mkvmerge v4.6.0 (‘Still Crazy After All These Years’) built on Mar 10 2011 02:50:32
Writing library : libebml v1.2.0 + libmatroska v1.1.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 3h 33mn
Bit rate mode : Variable
Nominal bit rate : 1 773 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 536 pixels
Display aspect ratio : 2.40:1
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.108
Writing library : x264 core 114 r1913 5fd3dce
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / slices=4 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=2 / weightp=0 / keyint=24 / keyint_min=2 / scenecut=40 / intra_refresh=0 / rc_lookahead=24 / rc=2pass / mbtree=1 / bitrate=1773 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=20000 / vbv_bufsize=20000 / nal_hrd=vbr / ip_ratio=1.40 / aq=1:1.00
Default : Yes
Forced : No
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 3h 33mn
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Compression mode : Lossy
Language : English
Default : Yes
Forced : No