The MG3001 represents the latest technology in digital signal processing (DSP) engines for sound masking generator/equalizers. This model features two built-in digital noise generators and two analog noise generators allowing the versatility of digital, analog, or mixed noise at either of its two outputs. Each noise source is separately adjustable–between 80dBu and 0dBu in 0.1dB steps. The MG3001 offers a variety of user selectable filter options including one-third octave, parametric high/low pass, and high/low shelving filters. Each filter offers precision .1dB level and 1 Hz frequency steps. All set-up and operating functions of the MG3001 are conducted from a PC using software provided for Windows 95/98/2000/XP/NT4. After defining and downloading the control functions through the PC, the settings will be stored within the unit in non-volatile memory (no battery required). The MG3001 model features 12 storage memories and 12 preset functions. The unit occupies one rack space unit (13/4") with a depth of 10" behind the front panel. It contains a built-in power supply capable of operating between 94-260 VAC at either 50 or 60 Hz. The MG3001 includes a clock circuit that allows for varying paramenters at different times of day. The device will ramp up gradually so that workers do not notice a difference in the noise level.