love.audio.setEffect
Defines an effect that can be applied to a Source.

Not all system supports audio effects. Use love.audio.isEffectsSupported to check.
success = love.audio.setEffect( name, settings )
name string The name of the effect.
settings table The settings to use for this effect, with the following fields:
settings.type EffectType The type of effect to use.
settings.volume number The volume of the effect.
settings.... number Effect-specific settings. See EffectType for available effects and their corresponding settings.
success boolean Whether the effect was successfully created.
success = love.audio.setEffect( name, enabled )
name string The name of the effect.
enabled (true) boolean If false and the given effect name was previously set, disables the effect.
success boolean Whether the effect was successfully disabled.