Setting and Adjusting Parametric Filters
Point and click on a filter. It will change colors to show that it is selected. Then, drag the filter by the center to the desired frequency and gain. A parametric filter can be used to cut or boost over a desired bandwidth. Notice that each filter dot also has wings with two smaller dots. drag these to adjust the Q, or
width, of the filter to affect a smaller or larger bandwidth. The Q can also be adjusted from the WIDTH field: click on the ↓button to reveal the
Parametric Equalizer Edit Boxes and Controls
FREQ. Ð This box displays the frequency of the selected filter. Click on the ↑ and ↓ buttons to adjust the frequency of the filter, or type the desired frequency in the box.
WIDTH Ð The WIDTH box displays the width of the selected filter. Clicking on the ↓ button will reveal a
GAIN Ð The GAIN box displays the amount of cut or boost in dB applied to the selected filter. Clicking on the ↑ and ↓ buttons will adjust the gain of the filter. With the high and low shelving filters, the response will shelve at the level of the gain setting. However, once the high or low filter is adjusted to less than ±18 dB, this box becomes the TYPE field and lists CUT to indicate that the filter has become a cut filter.
High- and Low-Frequency Shelf/Cut Filters
The parametric equalizer offers both high- and
Shelf Ð The Shelf filters can be adjusted from +6 dB to ±18 dB in 1/2 dB increments. Shelving is extremely useful for reducing microphone Proximity Effect, tempering very sibilant vocal microphones, or enhancing the sound of
Cut Ð There is an additional step below ±18 dB which changes a shelf filter to a cut filter. The slope of the cut is fixed at ±12 dB/octave. Cut filters are ideally used for attenuating the audio signal where extraneous noise, excessive proximity effect, or other unwanted noise is present. The illustration below shows a response curve with high- and
English ±18
