In 'Amadeus,' the quote 'This was a music I had never heard... filled with such longing' describes Salieri's awe of Mozart’s talent. To highlight the 'divine' quality of the music legend, the glass armonica is featured. Invented by Benjamin Franklin, the glass armonica consists of a series of rotating glass bowls played by touching the rims with wet fingers. It produces a pure, ethereal, and 'ghostly' tone. In the film, it is used during moments where Mozart's genius feels otherworldly. Historically, the instrument was so haunting it was once rumored to cause mental illness in its players. Its inclusion in 'Amadeus' helped the audience understand why Salieri believed Mozart’s music was the literal voice of God. This choice showed how a rare, historical instrument can define the 'legend' of a composer and the intense envy expressed in the film's dialogue.