Is it possible to fix audio on dvd back up?

[rock13979]

Hi:
Here's the problem: I have some dvd's that was made for me with some old tv shows. When I play them the video is ok but Im only getting sound from one channel. For example: I hear the sound out of the right speaker and there is no sound from the left speaker. Is there a way to fix this when I back up these dvd's.
Thanks in advance

[Baldrick]

demultiplex the dvd to video and audio files with rejig or dvd decrypter, guide: https://www.videohelp.com/forum/viewtopic.php?t=224833#dvddecrypterdemultiplex

fix the audio in for example goldwave, copy one channel to the other

remultiplex/reauthor the old video and the new audio with muxman or ifoedit. you will lose the menus or other extra material.

[rock13979]

Hi: i got stuck on using GoldWave. Can you tell me how to fix the audio, copy one channel to the other. Or maybe there is a easier software that I can use im kind of a newbie, but can follow directions
Thanks