@armando-bersani My font package is a "work in progress" ... a nice way of saying it is incomplete. The clarinet fingerings (and most other instruments) have yet to be implemented. An initial version of sax fingerings is in the v1.008 release.
The idea of the font package is to allow you to easily type finger diagrams in documents, web pages, etc. Some people do use a text-based approach ... such as <xxxx|xooo ... where the "<" indicates the mouthpiece and the "|" indicates the split between the upper and lower hand. However, a vector-based font such as TrueType or OpenType is much more appealing.
The initial v1.008 of the Sylphyo fonts was a trial put out for testing and comments. And I have had many good comments, some of which suggest a re-design of the entire font package.
In particular, there was a suggestion to use the advanced features of OpenType to actually allow someone to type <xxxx|xooo ... and have the font itself provide a substitution which would allow applications (those that implement those advanced OpenType features) automatically change that <xxxx|xooo into a single finger diagram from the font. As it stands now, you have to locate the correct Unicode code point and enter it by hand, which is lot of work.
There have been many other worthwhile suggestions (some of them above), the bulk of which expand the scope of this project (for me) significantly. I honestly have not had the impetus to undertake this larger project as we have been on the road for an extended trip (across Southern Europe - with the Sylphyo and a full recording rig - all worked beautifully!).
If people in this community are eager for this font project to move forward ... please make a note in this thread and it might provide encouragement for me to move forward with this project ...