Quoted from Rarehero:Some of the voice levels are too low IMO and get drowned out by the music and sound FX...not sure if the original was that way, too....but if there's a discrepancy, it's probably from using the uncompressed files.
I'm 99% sure that the original was that way as well. I remember noticing this the very first time I played it in a distributor back when the original was released.