getVolume() getVolume() : integer Get the current volume of this speaker. Returns integer — The current volume between 0 and 100
setVolume() setVolume(integer $volume) : void Adjust the volume of this speaker to a specific value. Parameters integer $volume The amount to set the volume to between 0 and 100
adjustVolume() adjustVolume(integer $adjust) : void Adjust the volume of this speaker by a relative amount. Parameters integer $adjust The amount to adjust by between -100 and 100