Orinj version 7.0.0
The Orinj Band Pass Filter passes a band of frequencies unchanged, while stopping the frequencies below that band and the frequencies above that band. See Band pass filter for more information on this type of effect.
An example of the Orinj Band Pass Filter
The following example contains two repetitions of an electric guitar riff. The first repetition is as recorded, without the band pass filter. The second one uses a band pass filter of order 8, centered at 1000 Hz, and with width of 2000 Hz. (As constructed, this filter lowers frequencies that are approximately below 500 Hz and above 2000 Hz).
Click to play this example with a band pass filter.
Using the Orinj Band Pass Filter
- To add the effect to a track in the session, first click on the track to select it. Click on Effect, Filtering, and then on Orinj Band Pass Filter in the menu.
- To add the effect to an auxiliary channel in the session, click on Track, then Groups / Aux Channels, and then on Aux Channel Controls in the menu. In the auxiliary channel control dialog, click on the Add button.
- To add the effect to the master channel in the session, click on Track and then on Master Channel in the menu. In the master channel dialog, click on the Add button.
- To add the effect to a wave in the single wave view, click on Effect, Filtering, and then on Orinj Band Pass Filter in the menu.
You will see the following dialog.
When this dialog becomes visible, the Orinj Band Pass Filter effect has been added. Adjust the parameters of the band pass filter in the dialog above and click Close. The parameters are described below.
Orinj Band Pass Filter parameters
See Orinj Effects for an explanation of the Title, Track, Presets, and Bypass controls. The remaining Orinj Band Pass Filter controls are described below:
- Order: Use this drop-down box to set the order of the filter. This is a Butterworth band pass filter. At larger orders, the filter becomes more precise and its magnitude response transitions faster from the bands in which frequencies are stopped to the band in which frequencies are preserved (the slopes in the graph will become steeper and the transition frequency bands narrower).
- Frequency: Use these controls – the box and the slider – to set the middle frequency of the pass band of the filter. The pass band is the set of frequencies that are passed by the filter. The frequency is measured in Hz and can be between 20 Hz and 22 kHz.
- Width: Use these controls – the box and the slider – to set the width of the pass band of the filter. The width is measured in Hz and can be between 20 Hz and 22 kHz.
- Q factor: The quality factor of the filter is the ratio of the midpoint frequency of the pass band (the frequency parameter) to the width of the pass 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 or width change. If you change the frequency, the width will change to keep Q constant. Similarly, if you change the width, the frequency will change to keep Q constant. The quality factor Q is kept constant only if the maximum and minimum limits on the frequency and width (20 Hz to 20 KHz) permit it.
- Filter graph: This graph shows the actual equalization that occurs in the filter.
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, and removing effects. See Band pass filter for additional information on band pass filters in audio processing.