Shure MXA902 - Compressor Settings (Threshold and Ratio); Parametric Equalizer

Shure Incorporated
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Threshold
When the audio signal exceeds the threshold value, the level is attenuated to prevent unwanted spikes in the output sig
nal. The amount of attenuation is determined by the ratio value. Perform a soundcheck and set the threshold 3-6 dB above
average talker levels, so the compressor only attenuates unexpected loud sounds.
Ratio
The ratio controls how much the signal is attenuated when it exceeds the threshold value. Higher ratios provide stronger
attenuation. A lower ratio of 2:1 means that for every 2 dB the signal exceeds the threshold, the output signal will only ex
ceed the threshold by 1 dB. A higher ratio of 10:1 means a loud sound that exceeds the threshold by 10 dB will only ex
ceed the threshold by 1 dB, effectively reducing the signal by 9 dB.
Parametric Equalizer
Maximize audio quality by adjusting the frequency response with the parametric equalizer.
Common equalizer applications:
Improve speech intelligibility
Reduce noise from HVAC systems or video projectors
Reduce room irregularities
Adjust frequency response for reinforcement systems
Setting Filter Parameters
Adjust filter settings by manipulating the icons in the frequency response graph, or by entering numeric values. Disable a filter
using the check-box next to the filter.
Filter Type
Only the first and last band have selectable filter types.
Parametric: Attenuates or boosts the signal within a customizable frequency range
Low Cut: Rolls off the audio signal below the selected frequency
Low Shelf: Attenuates or boosts the audio signal below the selected frequency
High Cut: Rolls off the audio signal above the selected frequency
High Shelf: Attenuates or boosts the audio signal above the selected frequency
Frequency Select the center frequency of the filter to cut/boost
Gain Adjusts the level for a specific filter (+/- 30 dB)
Q
Adjusts the range of frequencies affected by the filter. As this value increases, the bandwidth
becomes thinner.
Width
Adjusts the range of frequencies affected by the filter. The value is represented in octaves.
Note: the Q and width parameters affect the equalization curve in the same way. The only difference is the way the
values are represented.