Using the latest .189 build, I noticed that there are a few problems with the sounds. Some of the sounds get cut off. For example, when Darth Vader is supposed to say "I have you now", he says "I ha..." then cuts out. Also, some of the sounds don't play at all. Like when Luke is supposed to say "This is red five, I'm going in".
I checked out previous versions of MAME, and it seems to have started around the previous build 0.188. 0.187 and earlier builds seem fine. I didn't know if this was a known bug or not
Windows 10 64 bit OS
Intel Core i7-6700 3.4 GHz
Nvidia GeForce GTX 1060 3GB
16GB DDR4 RAM