6.4Setting High Pass/Low Pass Parameters
You can set the band of frequencies that will pass through the high pass and low pass filters and select the type of filter that is used through the channel’s High/Low Pass drop-down menu option.
To adjust the high/low pass parameters for a channel:
Step 1On the appliance Web UI’s main page, select DSP.
Step 2Select the Menu button for the channel.
Step 3From the drop-down menu, select High/Low Pass.
Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner. |
Step 4Set the parameters described in the following table:
High Pass (Low Cut) This feature helps eliminate low frequency noise (signals of 100 Hz and below, such as background rumble from ventilation systems, etc.) and is used primarily with microphone level input. It is particularly effective when hand held microphones are used. |
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Frequency |
Set the cutoff frequency. You can adjust the frequencies by moving the knob or by double-clicking the knob and typing the frequency. When typing the frequency, only numeric values from 20 Hz to 20,000 Hz can be entered.
The high pass filter attenuates content below this frequency and lets frequencies above this cutoff frequency to pass through the filter. |
Type |
Available filter types are: •Linkwitz-Riley (12, 24, and 36 dB per Octave) •Butterworth (12, 18, and 24 dB per Octave) •Bessel (12, 18, and 24 dB per Octave) The filter type name and the selected dB appear above the knob. |
Low Pass (High Cut) This feature helps eliminate high frequency noise (signals of 8000 Hz and above) such as background hiss and sibilance (excessive "S" in vocals, etc.) and is used primarily with microphone level input. It is particularly effective when hand held microphones are used. |
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Frequency |
Set the cutoff frequency. You can adjust the frequencies by moving the knob or by double-clicking the knob and typing the frequency. When typing the frequency, only numeric values from 20 to 20,000 can be entered.
The low pass filter attenuates content above this frequency and lets frequencies below this cutoff level to pass through the filter. |
Type |
Available filter types are: •Linkwitz-Riley (12, 24, and 36 dB per Octave) •Butterworth (12, 18, and 24 dB per Octave) •Bessel (12, 18, and 24 dB per Octave) The dB per Octave refers to how steep the roll off of the filter is after the selected cutoff frequency.
The filter type name and the selected dB appear above the knob. |
Band pass filters consist of a High Pass/Low Cut and a Low Pass/High Cut filter. This arrangement can be useful for tailoring the frequency response of a microphone exclusively for vocals, sometimes useful in a very noisy environment to filter out the higher and lower frequencies that could mask the human vocal range during announcements.