Could it be that this represents a system for generating music?

[Maruyama Toru]

Try using a loud voice for the large characters—like "ba"—and for the smaller characters, try using sounds like "u" or "fa."

So you're just making up arbitrary sounds for Voynichese letters?

Yes, more or less! I was just humming spontaneously while looking at the text. It was only a casual experiment, not a serious theory.