I will say that I was able to use Bizhawk and Livesplit with an autosplitter with no issues. Not sure what was causing your audio issues but do what you've got to do to play the game. Good luck with your runs!

The US Playstation version is considered the "standard" version. Faster original versions (PC, Saturn) will have loads converted to match. Slower versions (Japanese PS1, PS3) will not, but will still be listed.