Twenty years too late for it to possibly matter, but it's still nice to see. Interesting that there's no mention of what licence the source is being released under - and it's only available following email enquiries, of all things. I'm surprised they're even bothering, at this point - the software's so obsolete that it's not like it has much in the way of value anymore beyond nostalgia.
I'm still not sure exactly what I'm missing, as I have the "gist" of the visualizer working, but it just doesn't look as smooth as Winamp's. I think I need slight persistence and the little effect with the 'caps' that slowly fall down for each column (right now mine looks too jittery).