Yes, I discovered it can also be read through GoldWave (a similar program to Audacity), and furthermore I seem to get the correct sound from choosing either 44100Hz Mono or 22050Hz Stereo (both 16-bit), so who knows what the correct specification is supposed to be. Is this a common theme with all headerless/RAW music?
All I know is that it has to be downgraded from the original CDDA somehow - ripping it from an original CD results in a 551Mb WAVE file. Still, does this whole CDDA.SOU business mean that any audio data can effectively have its extension renamed to SOU and work, provided that the application is programmed to read it in that manner?
I'd love to make a size comparison between this file and a FLAC rip of the CDDA track at some point.