MBS - Sound Emittance (1.1.3)
This plugin allows you to set sound emittances for events, and for the first time in RPG Maker (as far as I know) with 3D sound positioning (thanks WebAudio /o/).
That's nice for creating sound effects on rivers, fire, people...
Sound Emitting Events
This little script allows you to set up events that will play BGS/ME/SE (you could try BGM, but..) if the player gets close enough.
The volume is based on the distance between the player and the event, so the closer the player is to the event...