I just connected my Sennheiser HD570 headphone to the Microsoft VGA cable using a 3.5 mm coupler. Now the problem that I'm having is that the sound volume is so low, obviously . Is there anyway to adjust the volume settings in the Xbox dashboard? If not, what other options do I have? Can I buy a wire with volume control for my Sennheiser headphone or will I have to buy a new set?