I am 67 and find music and background noise on TV movies/shows drowning out voice. Therefore, I am also interested in removing or decreasing background sounds from voice. I have the following thought, please comment.
If a karaoke circuit can remove voice, inverting and adding the karaoke output to the original should leave the voice and delete or reduce the background sounds. It would need to be a stereo source with voice reasonably centered, which, I believe most TV sources are. I don’t need complete removal of background, a reduction would be wonderful.