The response of the High Shelf filter is shown for a Level control setting of +6dB (red) and -6dB (blue) and a Frequency control setting of 1,000Hz.
High Shelving Filter
Purpose
The High Shelving Filter divides the audio spectrum. Frequency components above the division may be boosted or cut. The transition between the two regions occurs at a fixed 6dB/octave rate. The width of the transition between the shelved and un-shelved is dependent on the magnitude of the boost or cut applied.
Controls
Bypass
The Bypass button bypasses the device.
Frequency
Adjusts the transition frequency of the shelving filter.
Level
This adjusts the level of the high frequency shelf relative to the un-shelved portion of the frequency spectrum.
Note: It is possible to overload the filter if Level is set above +0dB. Such an overload will be indicated by the Overload Indicator.
Overload
Indicates clipping in the filter. Clipping is only possible if the Level control is set above +0dB.
Graphical Frequency Response
Displays the frequency response of the filter. See the EQ Curve Graphics Display documentation for a complete description.
Frequency Response
The response of the High Shelf filter is shown for a Level control setting
of +6dB (red) and -6dB (blue)
and a Frequency control setting of 1,000Hz.