Adjective
not musical in nature
lacking interest in or talent for music
lacking melody
Source: WordNet[N]o verse which is unmusical or obscure can be regarded as Poetry, whatever other qualities it may possess. Alfred Austin
Some writers are curiously unmusical. I don't get it. I don't get them. For me, music is essential. I always have music on when I'm doing well. Writing and music are two different mediums, but musical phrases can give you sentences that you didn't think you ever had. Barry Hannah
The Italians are very unmusical. If I go to a Protestant church in London or Amsterdam or listen to a black choir, I hear four-part harmony. Italians could never do that. In Italy, we all have to sing the melody because we cannot harmonise. Gian Carlo Menotti
The angels are so enamoured of the language that is spoken in heaven, that they will not distort their lips with the hissing and unmusical dialects of men, but speak their own, whether there be any who understand it or not. Ralph Waldo Emerson
the unmusical cry of the bluejay Source: Internet
too unmusical to care for concerts Source: Internet