I've been thinking of redoing these with the audio from Discotek's US release (since it contains no cuts from the commercial eyecatch unlike the UK DVD which somewhat clumsily removed them). When I did these back in 2012, I didn't have the best knowledge and just used a lot of lowpass filter to make the grain less noticeable - the problem with that is that the clarity takes a bit of a battering.
Unfortunately, I don't have access to any good audio quality rips of the US Tapes anymore, so I can't fix any of the audio glitches (Hercules' voice cutting out for a short bit in Episode 7 / The Termoid's voice cutting out for a short bit in Episode 12 / the muffled quality of episode 24). If anybody here has any old rips with good audio quality from back in the day, whether they be from the tapes or from bootleg DVD-Rs/VCD's - let me know. I'm kicking myself for getting rid of that DVD set of the VHS transfers from timesforgottendvd.