The phrase "harmony is vertical" means that        

Melody is regarded as “horizontal” because its notes are read from left-to-right, while harmony is “vertical” because the notes are played simultaneously, and A slightly elaborated melody with one or two voices and some intervals.

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Beethoven was a deaf man and couldnt hear. he became famous for his classical pieces. and there ye go.vivaldi was a true one hit wonder classical artist. hes known for his classical piece the four seasons. he was although wasn't as great as beethoven and yea 'ere ye a go.