You mean a dvd using Dolby Digital? What DVD has a DTS HD-MA soundtrack (assuming thats what you mean by DTS MA)? Dvds only have the lossy codecs, Dolby Digital and DTS, blurays get the lossless codecs DTS HD-MA or DTS:X or Dolby TrueHD or Dolby Atmos. Using the bluray the core 5ch version of the lossless track is usually provided. What sound modes are you using on your avr?