Watch Free Online on Hurawatch. 'I don't know if you've ever heard a goat eating carrots? It's almost too much, it's so lovely' An Eyeful of Sound conjures up the fascinating visually complex internal world of audio-visual synaesthesia, where senses make unique neural connections the rest of us don't experience. Synaesthesia is discussed, argued over, dissected and celebrated in this beautifully sensitive animated documentary.