Might want to try out Not only is it one of the best audio players out there but is also a nice utility for conversion as well. It's basically like the modern version of winamp from the old days where there was plenty of plugin and third party development. [url=http://www.foobar2000.org/components]Here is list of addon components that expand functionality.
Specifically take a look the ADPCM decoders 1.9. That addon will allow direct playing/conversion of the sound format used by Sega in a lot of Dreamcast games (ADX).

Edit: I own the Dreamcast collection also. I ripped Sonic's theme - It Doesn't Matter from it to demonstrate.

Yep, it can do that.

It can convert audio files into mp3, wav, and OGG among other less well known formats.

Lots of voice actors starting out use Audacity as recording software, I still use it myself and I can say it does its job well.

Thanks for the help, but I have long since done what needed to be done.

you might also take a look at ETYN - Audio Converter

You are just three years late :(