Recording audio from a DVD?

You CAN use a CD recorder. Or use a PC.

Here's a website for reference:
http://www.animemusicvideos.org/guides/avtech/audio3b.html

There was another easier to use guide, but the page has been down for quite sometime. It used Smartripper to extract the audio and HeadAC3he to transcode AC3 to WAV. No support for DTS soundtracks though.

You can use TOTAL RECORDER. cost is $12 us dollars.Do a search and then you download the recorder to your pc. Also good for recording webcasts from ie.BBC3.