ringw
Drum notations are not supported
Most drum notation software use MusicXML as output format, it would be nice if vexflow could handle drum glyphs.
If drum glyphs are added to the upstream VexFlow, I could add MusicXML parsing support for them. As far as I know, they are not currently available. If you don't mind, please open an issue at https://github.com/0xfe/vexflow.
I've just added percussion clef support to the MusicXML parser. I think the remaining steps are to add the "x" note glyph and any other custom glyphs, and then I will also need to add support for those in MusicXML.
Actually, I took a look at Vexflow source code, and percussions are partially handled. You can find some example in the /test/test_percussions.js file. Yet, they don't seem to be implemented in VexTab (or I don't know what I should write to display them), hence my confusion. Moreover, the chosen symbols are not standard.
I will take a look at your modifcation, thanks :)