As I said, I did check all of the settings, and while I was unable to literally hear from the computer I was accessing, due to it being remote access, the lady stated that she was able to hear the sounds from the various files using other players (winamp and Windows Media Player) just not through mIRC.
Writing a script for what she's wanting is easily done, though if there is something in mIRC that is not processing the sounds correctly, I fail to see how a script would over-ride this, since mIRC still needs to process the sounds via the script.