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Bandpass Filter Node

Standard bandpass filter. Frequencies outside the given range of frequencies are attenuated, frequencies inside it pass through.

In other words, this Node can be used to only keep a given range of frequencies in an audio source (e.g. frequencies around 1 kHz), and attenuate/mute the rest.

Inputs

Audio The Audio line to filter.
Frequency-control A Control input to automate the Frequency setting, in Hz, from 10 Hz to the Nyquist frequency. This input can be toggled from the settings panel.
Q-control A Control input to automate the Q setting, from 0.0001 to 1000. This input can be toggled from the settings panel.

Settings

Frequency Sets the effect’s center frequency, in Hz.
Q Sets the frequency band width. Greater values result in a smaller frequency band, and a sharper effect. For example, very high values can create a soft whistling sound out of a white-noise source.
Filter order Represents the order of the differential equation describing the filter.

Outputs

Output The filtered Audio.

Audio and Control lines (visualized with blue and purple, respectively) are both analogous to an analog signal.
They can be used interchangeably, and, for example, an Audio output (blue) can be connected to a Control input (purple), or vice-versa.

Technical details

This Node has exactly 2 samples of latency (equals ~0.0045 milliseconds at 44.1 kHz).

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