The paper will explore the effect HD broadcasting is having on the often neglected audio side of television. Particular reference will be made to the issues of field acquisition of 5.1 surround signals in a variety of market sectors, including news reporting, documentary and feature productions. In addition, studio origination of 5.1 audio will be examined. The challenges faced in manipulating these various kinds of 5.1 sound fields will be explored including questions of stereo and mono compatibility, and defining a satisfactory television sound signal that is acceptable to all viewers. Mention will be included of the significance of surround audio to the maintenance of market share.