What was considered to be the first keyboard instrument? hydraulis kithara panpipes aulos

Aulos

Explanation:

An aulos or tibia was an ancient Greek wind instrument, depicted often in art and also attested by archaeology. An aulete was the musician who performed on an aulos. The ancient Roman equivalent was the tibicen, from the Latin tibia, "pipe, aulos."

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3