it may mean 'new sounds' because it's talking about 'evoluciòn' which involves a development from a old music to a new one!In this case the word 'grafìa' which means 'writing' could be referred to the sheet music

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Note added at 12 mins (2009-03-26 14:19:02 GMT)
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better...and 'new' can refer not only to the today's music but also to a new way to do it!
I hope to be useful

Usually grafia in music refers to those circle and other marks in black on six lines tht musicians use as their universal language - musical script. If you put both the English term and the Portuguese term into google and request image, it should be clear.

I am not a pianist but I studied piano for thirteen years and "graphs" sounds strange to me, also.

Look at this reference:

Guide to the pianist's repertoire - Google Books Result
by Maurice Hinson - 2000 - Music - 933 pages
Each of these thirteen pieces deals with some problem of contemporary music. Some are highly dissonant. New symbols are used for pedal markings: full pedal. ...
books.google.com/books?isbn=0253336465...

Mike :)

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Note added at 43 mins (2009-03-26 14:49:53 GMT)
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What the agency sent you is very helpful. Those are not the traditional symbols that are used. Instead of a sharp (sostenido), it only goes up 1/4, and the same with the flat (bemol), going down 1/4 instead of a half tone. They symbols are indeed new, and do not represent the traditional annotation or symbols that Bach, Beethoven, Chopin, Handel, etc. used.