Do you mean 'real' band musicians or the company combat musicians, or both? They can be quite different even in known units.
I've not seen or collected any actual depiction of the 24e Legere anywhere.
They served in Moreaus' Army of Germany 1800; in Vandammes Division (Soults IVCorps) campaign and Austerlitz (being associated with the flanking manoeuvre that went wrong and the 4eme de ligne getting routed) and remained so in the subsequent years and campaigns of 1806/ '07.
I had to 'protolance' my own 26e Legere, so you should probably do the same, they will look as good as any other. Find some extant unit like the 16eL, 17eL, 27eL etc. and just copy their 'format' (Knotel also includes the 15eL but again not as reliable as others except the original prints).
I checked Hourtourlles 'Zenith' but nothing there, even if not as reliable as others. Absence probably means they had no idea either.
>>The Knotel picture of a carabineer had lots of extra white lace on the rank marking and epalettes.
@T Corret
Not sure which illustration you are referring to, but neither of those areas of uniform normally depict 'musicians'.
These that do are:- a lace/ tape on cuffs, lapels, collars and sometimes turnbacks and/ or pockets and shoulder wings. This may be white, but will often be in an 'approved' colour.
In addition a contrast colour was also used on some, not all, facings. This was applied to plumes as well, but not usually 'standard' items like cords and racquettes, pompoms or epaulettes (wings perhaps so).
Hope this helps a bit,
regards davew