Now there are only a few tools which extract Audio from DVDs. I will appreciate if someone tell me which tool does owe what disvantage.
Here's an easy way to do it, but it'll cost about $5. At Radioshack, they have a 1/8" input for your line in that accepts the red and white audio cables. Hook them up to your dvd player and your computer, and use the AVrack to record the audio. Very easy, but will take as long as it takes to play the audio as it does to record it.
