Mysteriously, Jill 1 and 3 sound fine. But Jill 2 has digital sounds only, no music. I've watched YouTube videos of it being played, and it has music right from the opening screen!

It's so strange - they are configured using "C" on the startup screen, all the same way - Use music track, Use digital audio, Use VGA...

I tried the original versions of the games, and then also the "complete collection" (I think it's effectively the same versions just in one folder), with exactly the same results.