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Hi Tingyu Qu,great idea to make a 3-d copy of a music box, we have in Aistria a long tradition in these instruments,don't know who envented it, but longer than 200 years I'm shure. I like also the programming possibility of yours. How is the sound? If you want to hear it louder then set it on a resonator,like wooden door or on a wooden frame of a paintings or classic guitars body e.s. o.All the bestMartin