converting multiflex
 

Hello All,
I have one particular DVD number, which appears to be multiflex,which I want to convert to CDG.
When I play it on my machine I have to mute one of the channels so the voice does not play.
I have software for converting DVD to wav. but the voice comes too.
Just like recording a regular CD.
Tried Vogone there is no difference, voice is still there.
Anyone know how I can get rid of the voice?
Regards from across the pond.
Garry