NO ROOT is required for this!!!
dts audio codecs are used for quite a lot of .mkv files. so if you prefere to use mxplayer instead of bsplayer here's the tutorial for you.
1) Extract the contents of the codecs
somewhere on your device (take note of where the folder you extracted is)
2) Once this is done, from MX Player, go to Settings -> Decoder -> Custom Codec
3) Locate the folder you extracted, select it and hit OK. Once MX Player restarts, it should work.
(remember to switch to s/w codecs when you turn the movie on)
got the codec from a "developers"
forum, so it's reliable
mi tablet works perfectly with it