Is there a Mono audio setting on the xbox?

Hi,

If I understand correctly, mono is the term for audio where identical information is sent to both speakers. I like to use headphones when I play and for some reason the jumping of the sound from ear to ear bothers me. I read somewhere online that the white video cable is mono, but I'm using hdmi so I don't know how that would work. I can't find it in the audio system settings either.

Is there any way to use mono sound on the xbox 360?

Thanks.

Microsoft support told me that I might be able to use a converter that will allow for mono sound. Does anyone have experience with stereo to mono converters? The person I spoke to said she could not guarantee that the sound would come through both earphones and not just one.