If you don't want to use sound spatialization, just ignore this property
Sound.mingain read/write property
Get or set the minimum gain to apply from spatialization. This property default value is set to 0.0
If you don't want to use sound spatialization, just ignore this property
Example
local audio = require "audio"
local console = require "console"
local sound = audio.Sound("music.mp3")
print(sound.mingain)