[hdmkv]

Most Dolby and DTS samples I've seen, and audio in actual BD rips, have a sampling rate of 48kHz (let alone 96 or even 192kHz). Here's a recent DTS:X clip's MediaInfo...

Code:

General
Unique ID                                : 195902915320325220203334824460634764463 (0x93618771D7268683B1218011E10B34AF)
Complete name                            : Y:\AV Test Clips\HD Audio Tests\DTS-X Gravity.mkv
Format                                   : Matroska
Format version                           : Version 4 / Version 2
File size                                : 294 MiB
Duration                                 : 1 min 26 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 28.4 Mb/s
Encoded date                             : UTC 2016-06-24 12:39:45
Writing application                      : mkvmerge v9.2.0 ('Photograph') 64bit
Writing library                          : libebml v1.3.3 + libmatroska v1.4.4

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : [email protected]
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 1 min 26 s
Bit rate mode                            : Variable
Bit rate                                 : 22.2 Mb/s
Maximum bit rate                         : 26.5 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.446
Stream size                              : 229 MiB (78%)
Default                                  : Yes
Forced                                   : No

Audio
ID                                       : 2
Format                                   : DTS
Format/Info                              : Digital Theater Systems
Format profile                           : X / MA / Core
Mode                                     : 16
Format settings, Endianness              : Big
Codec ID                                 : A_DTS
Duration                                 : 1 min 26 s
Bit rate mode                            : Variable / Variable / Constant
Bit rate                                 : 6 199 kb/s / 6 199 kb/s / 1 509 kb/s
Channel(s)                               : Object Based / 8 channels / 6 channels
Channel positions                        : Object Based / Front: L C R, Side: L R, Back: L R, LFE / Front: L C R, Side: L R, LFE
Sampling rate                            :  / 48.0 kHz / 48.0 kHz
Frame rate                               : 93.750 FPS (512 spf)
Bit depth                                :  / 24 bits / 24 bits
Compression mode                         :  / Lossless / Lossy
Stream size                              : 64.1 MiB (22%)
Default                                  : Yes
Forced                                   : No

Above is 24-bit though, which is likely resampled to 16-bit based on what we've learned as @wrxtasy pointed out.