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High Cut Filter

The High Cut filter (commonly known as a low-pass filter) works on the high frequencies of the audio signal (1 to 20 kHz). The High Cut filter is most commonly used to reduce noise and hiss, and to eliminate pops. By specifying a frequency for the high EQ, you set the cutoff frequency. Frequencies below the cutoff frequency pass through unaffected. Frequencies above the cutoff frequency are attenuated at a constant rate, depending on the Ratio setting. Adjust the Q curve to determine the range of frequencies affected. The default cutoff frequency setting is 12 kHz with a Q value of 0.71.

The following diagram illustrates the result of attenuating gain around the frequency of 10 kHz using a High Cut filter with a lower Q setting of 0.35.

The following diagram illustrates the result of attenuating gain around the frequency of 10 kHz using a High Cut filter with a higher Q setting of 0.80.