EQ/Filters For more information, see the following topics: EQ/Filters Graph Frequency Graph Gain Resolution Using the Frequency Graph to Adjust Controls Low Frequency EQ Controls Low Mid Frequency EQ Controls High Mid Frequency EQ Controls High Frequency EQ Controls Filter 1 and Filter 2 Controls The EQ/Filters section of Channel Strip provides a high-quality 4-band parametric equalizer for adjusting the frequency spectrum of audio material.