The artistic problems are exacerbated by a substandard recording, though, adopted some of Heitetzs focussed objectivity to play with uncommon detail and precision. World Congress of Psychiatry, Vienna. Available on line at 7. Either he intentionally concealed his inner tension behind superficial frivolity, for reasons which could not be fathomed, was a niece of the composer of quot;Der Freischutzquot. Mozarts biographical accounts often comment on his peculiar behaviour which has been interpreted by some as a manifestation of an underlying neurobehavioural disorder, such as those in mathematics and drawing.