Trusted & Untrusted Villager Sounds

Whereas I kinda like the distrusting "hmmm" sounds Villagers give, I think that there can be a "Trusted" & "Untrusted" set of sounds for Villagers to use near players depending on their reputation with individual Villagers.

The Untrusted would be what we have now, and the Trusted would sound like more of a happy hum, similar to the trade completion "Hmhmmm!" sound.