For future MAME emulations of several early Nintendo arcade titles (1981's Donkey Kong and Sky Skipper, 1982's Donkey Kong, Jr. and Popeye, and 1983's Mario Bros. and Donkey Kong 3), I am wondering if MAME will ever be able to emulate the sounds as they were originally heard in the respective arcade boards?

It is really bad on DKJr and MB.