The timbre of the sound from a musical instrument is a result of the combination of

The way it is made, how the vibrations are mad whether its a string instrument or a wind instrument, if it uses a mouthpiece or a reed as well as the materials it is made of

What i think is that it adds loudness for preachers/church choirs. it is also able to hold up a lot of weight without pillars. : )) idek tho