User manual

Filters
6.3.6 Dehum Enhancement
The DeHum enhancement suppresses humming noises in the audio file
The following setting options are available:
Graph
Hum Reduction
Displays the four notch filters.
Button
Automatic Hum
Detection
Automatically sets the optimum values for all filters.
The following setting options are available in the Dehum Filter Settings area:
Option buttons
Filter
Offers four different notch filters. These can be defined with the
sliders. The four notch filters can also be linked with the Link Fil-
ter option button. In this case, all slider changes apply to all filters.
Slider
Frequency
Specifies the frequency
of the hum that is to be filtered.
Slider
Gain
Specifies the extent to which hum is to be suppressed.
Slider
Width
Specifies whether the range of the notch filter rises and falls
steeply or gently.
6.3.7 Filter Toolbox Enhancement
The Filter Toolbox enhancement allows you to define your own audio filters.
The following setting options are available:
Check box
User Drawn Filter
Response
Activates the option for changing the graphic using handles.
Graph
User Drawn Filter
Response
Allows you to define a filter yourself by means of adjustable cur-
ves.
Switches between a linear and logarithmic scale for the limiting
frequency graphic.
Check box
Band Pass Filter
Adds a Band Pass Filter that allows a certain frequency range to
be exceeded.
Slider
Upper Limit
Specifies the upper frequency limit for the bandpass filter.
Slider
Lower Limit
Specifies the lower frequency limit for the bandpass filter.
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