If you don't want to use sound spatialization, just ignore this property
Sound.rolloff read/write property
Get or set the sound current rolloff (speed and direction)
This property expects a number
, representing how quickly a sound rolls off as it moves away from the listener. The default value is set to 1.0
Example
local audio = require "audio"
local console = require "console"
local sound = audio.Sound("music.mp3")
print(sound.rolloff)