There is the cabmame diff which fixes the old tearing/sound stuttering conundrum by pitch shifting the sound to avoid the stuttering when you get rid of tearing. I think it might do some stuff with putting some games in their proper resolution or something too...I don't really know exactly what cabmame is all about because I've never used it.
What we need is a diff that will change Donkey Kong (and maybe some other games) so that it uses samples again rather than the discrete audio. I realize the discrete audio is more accurate from an emulation standpoint, but man it sucks IMO. So muffled. I know I could just use an older version of mame, but I think they corrected the girder color and dropped samples at the same time, so I would have to sacrifice correct colors to use samples again and that bugs me too.