After some research, I found some discussion of a software tool Nicolas built that had a similar intention; from what I can tell, his strategy was to use this software to interpret input from a standard keyboard as LilyPond functions, rather than using separate hardware. The obvious advantage of his approach is that no additional hardware is required; on the other hand, it is only compatible with the editing software it was written for and requires the user to learn (and, I believe, memorize) the key "map" or use a "cheat sheet" of some sort. Unfortunately, it also appears that it's no longer available...
- Nikolai On Fri, Apr 8, 2022 at 5:07 AM Jean Abou Samra <j...@abou-samra.fr> wrote: > > > > Le 08/04/2022 à 02:34, Nikolai Hedler a écrit : > > 3. Has something like this been done before for LilyPond? > > You might be interested in discussing this with Nicolas Sceaux, who did > something similar if I recall correctly. > > https://editions-nicolas-sceaux.fr/ > > Best, > Jean >