Answer:
Handy when you need to measure something or run a kingdom.
What is the ending of all that begins?
A beautiful succession of sounds.
In the middle of night, I surround the gong. In the middle of sight, I end the song
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?