(display (open-tag 'music '((type . score)) '()) port)
(display (musicxml-node->string (music->xml-node music)) port)
(display (close-tag 'music) port))
(display (open-tag 'music '((type . score)) '()) port)
(display (musicxml-node->string (music->xml-node music)) port)
(display (close-tag 'music) port))