Orinj version 5.0.0
The Orinj Notch Filter removes a narrow band of frequencies from the signal. See Notch filter for more information on this type of effect. This notch filter is also appropriate for removing offending frequencies that make the recording too booming, boxy, or nasal or create too much sibilance. See Equalizer for more information.
Using the Orinj Notch Filter
The Orinj Notch Filter can be added to tracks in the multitrack session view, tracks in the loop building view, and to waves in the single wave view. In the multitrack session view and in the loop building view, first select the track to which you want to add the effect. In all these views, click on Effect, Filtering, and then on Orinj Notch Filter in the Orinj menu. You will see the following dialog.
When this dialog becomes visible, the Orinj Notch Filter effect has been added. Adjust the parameters of the notch filter in the dialog above and click Close. The parameters are described below.
Orinj Notch Filter parameters
See Orinj Effects for an explanation of the Title, Track, Presets, and Bypass controls. The remaining Orinj Notch Filter controls are described below:
- Filter graph: This graph shows the desired and actual equalization that occurs in the filter.
- Frequency: Use these controls – the box and the slider – to set the midpoint frequency of the notch of the filter. The frequency is measured in Hertz and can be between 20 Hz and 20 KHz.
- Transition: Use these controls – the box and the slider – to set the width of the transition (slope) between the bottom of the notch and the sides of the notch. The transition is measured in Hertz and can be between 20 Hz and 20 KHz.
- Width: Use these controls – the box and the slider – to set the width of the bottom of the notch. The width is measured in Hertz and can be between 20 Hz and 20 KHz.
- Q factor: The quality factor of the filter is the ratio of the midpoint frequency of the stop band (the frequency parameter) to the width of the stop band (the width parameter) (see Equalizer for more information). This factor is larger for larger frequencies or smaller widths.
- Lock Q: Selecting this checkbox keeps Q constant when the filter frequency, transition, or width change. If you change the frequency, the width and transition will change to keep Q constant. Similarly, if you change the width, the frequency and transition will change to keep Q constant. The quality factor Q is kept constant only if the maximum and minimum limits on the frequency, transition, and width (20 Hz to 20 KHz) permit it.
The presets of the Orinj notch filter are suggestions. For example, the preset to make a recording less boomy sets the notch filter frequency at 200 Hz. However, the offending frequencies that create boominess may be centered elsewhere (typically between 100 Hz and 300 Hz; see Equalizer). When using the Orinj notch filter, move the filter frequency to the left and to the right to find the best setting for your purpose.
See Orinj Effects for additional notes on: where Orinj effects can be used, using boxes and sliders that impact the same parameter (such as the box and slider for the frequency), applying effects to mono and stereo waves, and using effects during playback. See Orinj Working with effects for additional information on creating, modifying, moving, removing, and processing effects. See Notch filter and Equalizer for additional information on the different types of notch filters in audio processing.