sound on dvds

First off let me explain that my dvd rom drive and my dvd burner wont play any type of sound as if not been able to figure out why. My speakers work and files on my cpu work like mp3s and such.

anyways

it seems i have to turn the sound to about 90 percent of the max to hear it good on my tv. I play them on my ps2. I burn them with decrypter/shrink with verbatim lightscribe media

normally like that?