The website fore starlight celebration

http://www.playonline.com/pcd/topics...67/detail.html

says

Games for the Willing and Able!

During the Starlight Celebration, special minigames will be available for adventurers to enjoy. To the victor goes the spoils—items, synthesis materials to create an orchestrion, and sheet music key items to be used with it.

Southern San d'Oria (H-9)
Post Bastok (K-12)
Windurst Woods (K-12)

The bastok location is incorrect, the correct location is (K-8) the same location/npc used for the summer event minigames