I have learned all of the Songs, except for one; the LVL Song. Does anyone have a list of where all of the pianos are, because I really want to complete this little sidequest. Where is the last piano? :(

Have you been to mirage village yet? Theres one there thats sort of hidden away.

there is also a hidden piano in some tavern (i think in the wolves village) but is appears with passages

you can do it better