i installed Newnigma2 v3.1.1 box 500hd
when i play mkv video with DTS audio there is no sou nd.
so i installed :
libdca0_0.0.5-r1_mipsel.ipk
dreamdts_1.0-r0_mipsel.ipk

this fixed DTS audio problem , i can play DTS with sound.
but my problem now with AC3 files ,there is no sound.