The Langeleik has the following stats: March+3 "Etude"+3.
http://images1.wikia.nocookie.net/__.../Langeleik.png
As far as I'm aware, every other instance of a song enhancement on a piece of equipment is quoted, eg: "March"+3 "Etude"+3
http://images1.wikia.nocookie.net/__...ronRamHorn.png
http://images2.wikia.nocookie.net/__...ie_Piccolo.png