However, you may meet such problem as the burned DVD that is converted from Blu-ray has no sound when playback in DVD players. One possible cause of this problem is the DTS audio track in the original Blu-ray file.

DTS is a series of multichannel audio technologies, used both in standard DVD disc and Blu-ray disc. All BD-ROM players are required to support DTS. However, although PC software players and modern DVD players can play DTS audio without problem, early DVD players cannot recognize DTS audio tracks, because DTS was not part of the original DVD specification and the DVD specification was revised to allow optionally include DTS audio tracks. The DVD title must carry one or more primary audio tracks in AC-3 or LPCM format (in Europe, MPEG-1 Layer 2 is also an allowed primary track format). The DTS audio track, if present, can be selected by the user.

Therefore, when you are converting your Blu-ray movie to DVD, you need to pay attention to the playback compatibility of the audio track in your DVD player. If your burned DVD has no sound in playback, firstly you can find out what audio track it has (see this in the video converter when converting or drop the converted file in MediaInfo for the file detail information). If the soundtrack is DTS format, you’d better convert it to AC3 when doing the conversion of Blu-ray to DVD.

Free video converters like AVStoDVD that can convert Blu-ray to DVD has this DTS to AC3 converting option:

convert to AC3 audio in AVStoDVD

If you would like to convert your Blu-ray movies to MKV format so that they can be widely played by your computer, portable players or standalone devices like HTPC, Popcorn Hour and Western Digital player, refer to this article: How to Convert M2TS to MKV for Free.