You can burn 24/96 wav files to DVD's. 24/96 is an audio standard for regular DVD's. Any DVD player, including $40 cheapos and portables, can play 24/96 audio. There is a cheap computer program that takes 24/48 or 24/96 wav files and converts them to VOB files that play on any DVD player without touching the audio (no conversion). Very quick on old computers, because there is no conversion. The software program I know of is Audio DVD Creator.
This is incorrect
DVD playback supports many bit depths etc. 16/44.1,48 24/44.1,48,96,192
Your DVD player DOES NOT by default support the output of these bit depths. They might be able to read the file but conversion is taking place. You MUST look at the documentation of your player to see what bit depths it will support / output.
I have owned many DVD players that will not output at 24Bit PCM. They will simple truncate or dither for playback. The DVD-A players that support DVD-A playback also must be looked in to to make sure that they are indeed outputting the original info. Some DVD and DVD-A players will nerf the digital output.
The programs that will "Play in any dvd player" are usually limited to 24/48 and once again are dependent on the playback device, Although they are generally more universal (meaning folks without the real playback needed will still hear music" it all really depends.