The question was about fonts.

One proprietory font is included with the "hard copy" Windows DT: Digitrad.ttf. It's a staff notation font. I haven't installed it, but the program displays perfectly well without it (though I do have a number of music fonts already, which I suppose would help). I'd imagine that that is the font referred to? I don't see any alphabetic fonts in the package, and I'd guess that standard defaults are used, though I don't actually know.