Johannes von Gmünden

[oshfdk]

Not many writings of his own hand survive, unfortunately. One of them that does, is Augsburg, Universitätsbibl., Cod. III.1.4° 1 (You are not allowed to view links. Register or Login to view.). 

I think a similar MS has been discussed not a long time ago, there is some list of syllables on 67r-76v, I remember discussing ideas about what these could be for.

Edit: found it You are not allowed to view links. Register or Login to view.

Regarding "vix", etc, given this is a list of all possible syllables, as it seems, it's no surprise almost every syllable can be found there.