volume control

Mine must be too low because I can't hear a thing you're saying

 

hmm...well this question could be a bunch of different things. He/She could be asking about why the volume goes down after a few hours, or perhaps if there is a setting for controlling the volume at a certain level, or even if there is a setting for Henkaku....but who knows, since the OP's volume has clearly been set at a minimum of zero.