The author mentions Beethoven. Consider what a virtuoso pianist must go through to create a performance of a 40-minute-long sonata. Yes, the performance include

The author mentions Beethoven. Consider what a virtuoso pianist must go through to create a performance of a 40-minute-long sonata. Yes, the performance includes her personal interpretation of what's written on a piece of paper. It is almost certainly influenced by performances others have created. But when it comes to the individual notes, their sequence had damn well better be literally correct for the entire performance. If not, someone in the audience will certainly notice that one flubbed note. So in learning the work, "she was changed in some way" all right. As some members of the audience had been ... identically. And that 'some way' certainly resembles pulling bytes out of 'storage'.