Four channel, PC programmable, line-level attenuator used primarily to control soundmasking levels based on time of day and day of week. It can also be used to provide attenuation schedules for background music and paging signals. Custom schedules can be created and downloaded to DS1404 using provided Windows based software. Front panel provides buttons for making minor adjustments. Rear panel provides line-level input and output connections via pluggable connectors, commincations port for serial connection with PC and by pass controls for each channel. It comes preconfigured for standard monday through friday work schedule and may be used without need to customize schedule.