Stereo audio level controller. Provides audio processing with unprecedented sound transparency, yet is exceedingly effective at controlling levels. No other product can match the performance of the 320D. Algorithms like our DVG, DRC and FDL have yet to find any rivals. Frequency discriminate leveler section with the dynamic verification gate and the silence gate, slowly adjusts the volume level of an audio stream with very complex algorithms that hide its work. It works differently at different frequencies and stops processing when the sound stops then resumes instantly when the sound reappears so there is no distracting increases in program background noise. When you listen, you know the levels are made more even, but you don’t perceive the levels are shifting.