What makes the sound vibrate in an instrument?

Question

is it the lips or the cup mouthpiece?

Answer 1

The tiny hits and pulses make vibration.

Answer 2

The sound depends on the pitch of the vibration. The sound does not come from the mouth it comes from the throat of our body.

Answer 3

The sound doesn't vibrate in an instrument. The vibrations of the instrument make the sound, which is vibration in the air that is conveyed to our ears.

Answer 4

its a transfer of mechanical energy. sound is a mechanical energy emanating as waves in a medium (i.e. air). when its an object it dissipates its energy to it making vibrate.