The cornu is an ancient musical instrument very similar to the buccina.
Each of the Greek muses had a specific talent in the arts.
2:1
You are correct; the Roman military trumpet was about four foot in length, and was used as a military signal trumpet. It was usually made from copper or iron and was a conical bore straight tube that came in three pieces with a mouthpiece. Although the Roman tuba (trumpet) was used at sacrifices, processions, triumphal processions and funerals, it was primarily used to announce troop movements during battle. Classifications range from 'wind' to 'brass' to 'aerophone' and it was intended to be played as loudly as possible.
consonant and dissonant
was not as highly valued (APEX)
kithara
Pythagoras conducted the first experiments in acoustics.
Apollo
Quadrivium refers to the four subjects that were studied in school.
pathos
hydraulis
Instead of banning certain modes altogether Aristotle recognized that modes could be used for different reason.
Maracas and Finger cymbals.