Hmm, well, it's not possible to edit the code for Viva Nonno, but if I could get this to work for MAME then that would be ok, except I don't know what I'm looking for. Guess I'm not smart enough for the smart option.
I found that you can open .bin files from the game in Audacity but it's a bit funky. It seems you need to reduce the playback speed about 75% and even then, the sound is scratchy for some reason. I can blank the section of sound containing the voices, but I don't know what format to save it in. I guess MAME will reject it anyway since it'll have a different CRC number.