I think no artist can claim to have any access to the truth or an authentic version of an event. But obviously they have slightly better means at their disposal because they have their art to energize whatever it is they're trying to write about. They have music.
More than art more than literature music is universally accessible.
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Every man should follow the bent of his nature in art and letters always provided that he does not offend against the rules of morality and good taste.