Fomus

these marks add common ornamentation markings. glissandi and portamenti may be set to occur before or after a note (the default for both is :before). a :tremolo mark is notated by placing slashes over the note stems while the :tremolofirst and :tremolosecond marks refer to the chordal tremolos commonly found in piano scores. these are processed by separating the notes marked "first" from the ones marked "second" into separately notated chords and placing a tremolo-style beam over them. the optional :notated keyword indicates that the subdivision number is to be interpreted as a written duration. the optional :up and :down keywords in the :arpeggio mark specify that a direction is to be notated using an arrowhead. The optional note arguments are for specifying the trill note. Only half and whole step trills are currently supported (and unison trills for percussion instruments).

(:tremolo &optional trem-subdiv <-> :notated)
(:tremolofirst &optional trem-subdiv <-> :notated)
(:tremolosecond &optional trem-subdiv <-> :notated)
(:longtrill &optional note)
(:arpeggio &optional :up || :down)
(:glissando &optional :before || :after)
(:portamento &optional :before || :after)
(:trill &optional note)
(:mordent &optional note)
(:prall &optional &optional note)