The BDI ACS-300 Six Channel Audio Controller was created to meet the demands of today's multi-channel audio environment. The unit is designed to accept six channels of audio and, upon remote control, dim all six channels by 10-, 20- or 30-db. A second command line mutes all channels simultaneously. There are also separate mute command lines for individual or grouped channel muting. The unit can support up to six channels simultaneously, three stereo pairs, or six individual channels. Uses include control of control room or studio monitors for 5.1 multi channel audio systems such as those found in digital television or HD radio applications. The overall dim function can be used for paging or intercom applications where it is desired to reduce the level of an entire monitor system so that page or intercom audio can be heard more clearly throughout a facility.