Will of Sound

The Will of Sound is a will that, like the Will of Stone and the Will of Fire, is present only in the land of sound, specifically Otogakure. It is a will that has been running as long as the village has began, and most ninja in the village follow this will, and have inherited it.

Meaning
The will of sound has a less complex meaning than the will of Fire. It is simple. Written one the entrance to otogakure, it reads this. "We are nobody. We are on no side, our mouths are closed. We do not wish to see the Evils of this world, however, what we do wish is to hear the truths." Meaning they are neutral, and they do not want to hear those who they believe are ruining the worlds, they only hear those that are of value.

Conception
It is heavily believed that Orochimaru started this will, back when the village had just began, and was just a village mainly for science, and not a village with a Kage or simple villagers. The people of otogakure believe he created the will so his people would inherit it over the years, hopefully soon spreading this Will across the world.