web.audio.BiquadFilterNode
The BiquadFilterNode interface represents a simple low-order
and is created using the AudioContext.createBiquadFilter()
It is an web.audio.AudioNode that can represent different kinds
filters, tone control devices, and graphic equalizers.
The BiquadFilterNode interface represents a simple low-order and is created using the `AudioContext.createBiquadFilter()` It is an `web.audio.AudioNode` that can represent different kinds filters, tone control devices, and graphic equalizers.
constructorcljs
(constructor & args)Constructor.
The BiquadFilterNode() constructor of the Web Audio API creates a new web.audio.BiquadFilterNode object, which represents a simple low-order filter, and is created using the AudioContext.createBiquadFilter() method.
Inherits parameters from the web.audio.AudioNodeOptions dictionary.
context
A reference to an web.audio.AudioContext.
options Optional
Options are as follows:
type: One of "lowpass", "highpass", "bandpass", "lowshelf", "highshelf", "peaking", "notch", "allpass". The meaning of the other options depends on the value of this one. The defaults for all are as follows:
Q: 1 detune: 0 frequency: 350 gain: 0
lowpass: (Default) Allows frequencies below a cutoff frequency to pass through, and attenuates frequencies above the cutoff. This is a standard second-order resonant lowpass filter with 12dB/octave rolloff.
Q: Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked. Please note that for this filter type, this value is not a traditional Q, but is a resonance value in decibels. frequency: The cutoff frequency. gain: Not used.
highpass: A highpass filter is the opposite of a lowpass filter. Frequencies above the cutoff frequency are passed through, but frequencies below the cutoff are attenuated. It implements a standard second-order resonant highpass filter with 12dB/octave rolloff.
Q: Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked. Please note that for this filter type, this value is not a traditional Q, but is a resonance value in decibels. frequency: The cutoff frequency. gain: Not used.
bandpass: A bandpass filter allows a range of frequencies to pass through and attenuates the frequencies below and above this frequency range. It implements a second-order bandpass filter.
Q: Controls the width of the band. The width becomes narrower as the Q value increases. frequency: The center of the frequency band. gain: Not used.
lowshelf: The lowshelf filter allows all frequencies through, but adds a boost (or attenuation) to the lower frequencies. It implements a second-order lowshelf filter.
Q: Not used. frequency: The upper limit of the frequences where the boost, or attenuation, is applied. gain: The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated.
highshelf: The highshelf filter is the opposite of the lowshelf filter and allows all frequencies through, but adds a boost to the higher frequencies. It implements a second-order highshelf filter.
Q: Not used. frequency: The lower limit of the frequences where the boost, or attenuation, is applied. gain: The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated.
peaking: The peaking filter allows all frequencies through, adding a boost, or attenuation, to a range of frequencies.
Q: The width of the band of frequencies that are boosted. A large value implies a narrow width. frequency: The center frequency of the boost range. gain: The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated.
notch: The notch filter (also known as a band-stop, or band-rejection filter) is the opposite of a bandpass filter. It allows all frequencies through, except for a set of frequencies.
Q: The width of the band of frequencies that are attenuated. A large value implies a narrow width. frequency: The center frequency of the attenuation range. gain: Not used.
allpass: An allpass filter allows all frequencies through, but changes the phase relationship between the various frequencies. It implements a second-order allpass filter.
Q: The sharpness of the phase transition at the center frequency. A larger value implies a sharper transition and a larger group delay. frequency: The frequency where the center of the phase transition occurs. Viewed another way, this is the frequency with maximal group delay. gain: Not used.
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/BiquadFilterNode
Constructor. The BiquadFilterNode() constructor of the Web Audio API creates a new `web.audio.BiquadFilterNode` object, which represents a simple low-order filter, and is created using the AudioContext.createBiquadFilter() method. Inherits parameters from the `web.audio.AudioNodeOptions` dictionary. context A reference to an `web.audio.AudioContext`. options Optional Options are as follows: type: One of \"lowpass\", \"highpass\", \"bandpass\", \"lowshelf\", \"highshelf\", \"peaking\", \"notch\", \"allpass\". The meaning of the other options depends on the value of this one. The defaults for all are as follows: Q: 1 detune: 0 frequency: 350 gain: 0 lowpass: (Default) Allows frequencies below a cutoff frequency to pass through, and attenuates frequencies above the cutoff. This is a standard second-order resonant lowpass filter with 12dB/octave rolloff. Q: Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked. Please note that for this filter type, this value is not a traditional Q, but is a resonance value in decibels. frequency: The cutoff frequency. gain: Not used. highpass: A highpass filter is the opposite of a lowpass filter. Frequencies above the cutoff frequency are passed through, but frequencies below the cutoff are attenuated. It implements a standard second-order resonant highpass filter with 12dB/octave rolloff. Q: Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked. Please note that for this filter type, this value is not a traditional Q, but is a resonance value in decibels. frequency: The cutoff frequency. gain: Not used. bandpass: A bandpass filter allows a range of frequencies to pass through and attenuates the frequencies below and above this frequency range. It implements a second-order bandpass filter. Q: Controls the width of the band. The width becomes narrower as the Q value increases. frequency: The center of the frequency band. gain: Not used. lowshelf: The lowshelf filter allows all frequencies through, but adds a boost (or attenuation) to the lower frequencies. It implements a second-order lowshelf filter. Q: Not used. frequency: The upper limit of the frequences where the boost, or attenuation, is applied. gain: The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated. highshelf: The highshelf filter is the opposite of the lowshelf filter and allows all frequencies through, but adds a boost to the higher frequencies. It implements a second-order highshelf filter. Q: Not used. frequency: The lower limit of the frequences where the boost, or attenuation, is applied. gain: The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated. peaking: The peaking filter allows all frequencies through, adding a boost, or attenuation, to a range of frequencies. Q: The width of the band of frequencies that are boosted. A large value implies a narrow width. frequency: The center frequency of the boost range. gain: The boost, in dB, to be applied. If the value is negative, the frequencies are attenuated. notch: The notch filter (also known as a band-stop, or band-rejection filter) is the opposite of a bandpass filter. It allows all frequencies through, except for a set of frequencies. Q: The width of the band of frequencies that are attenuated. A large value implies a narrow width. frequency: The center frequency of the attenuation range. gain: Not used. allpass: An allpass filter allows all frequencies through, but changes the phase relationship between the various frequencies. It implements a second-order allpass filter. Q: The sharpness of the phase transition at the center frequency. A larger value implies a sharper transition and a larger group delay. frequency: The frequency where the center of the phase transition occurs. Viewed another way, this is the frequency with maximal group delay. gain: Not used. See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/BiquadFilterNode`
detunecljs
(detune this)Property.
[Read Only]
An a-rate web.audio.AudioParam.
`var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadFilter.detune.value = 100;
Note: Though the AudioParam returned is read-only, the value it represents is not.`
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/detune
Property. [Read Only] An a-rate `web.audio.AudioParam`. `var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadFilter.detune.value = 100; Note: Though the AudioParam returned is read-only, the value it represents is not.` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/detune`
frequencycljs
(frequency this)Property.
[Read Only]
An web.audio.AudioParam.
`var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadFilter.frequency.value = 3000;
Note: Though the AudioParam returned is read-only, the value it represents is not.`
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/frequency
Property. [Read Only] An `web.audio.AudioParam`. `var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadFilter.frequency.value = 3000; Note: Though the AudioParam returned is read-only, the value it represents is not.` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/frequency`
gaincljs
(gain this)Property.
[Read Only]
An web.audio.AudioParam.
`var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.gain.value = 25;
Note: Though the AudioParam returned is read-only, the value it represents is not.`
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/gain
Property. [Read Only] An `web.audio.AudioParam`. `var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.gain.value = 25; Note: Though the AudioParam returned is read-only, the value it represents is not.` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/gain`
get-frequency-responsecljs
(get-frequency-response this
frequency-array
mag-response-output
phase-response-output)Method.
js.undefined
BiquadFilterNode.getFrequencyResponse(frequencyArray, magResponseOutput, phaseResponseOutput);
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/getFrequencyResponse
Method. `js.undefined` `BiquadFilterNode.getFrequencyResponse(frequencyArray, magResponseOutput, phaseResponseOutput);` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/getFrequencyResponse`
qcljs
(q this)Property.
[Read Only]
An web.audio.AudioParam.
`var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.Q.value = 100;
Note: Though the AudioParam returned is read-only, the value it represents is not.`
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/Q
Property. [Read Only] An `web.audio.AudioParam`. `var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.Q.value = 100; Note: Though the AudioParam returned is read-only, the value it represents is not.` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/Q`
set-type!cljs
(set-type! this val)Property.
A string (enum) representing a BiquadFilterType.
var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.type = 'lowpass';
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/type
Property. A string (enum) representing a BiquadFilterType. `var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.type = 'lowpass';` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/type`
typecljs
(type this)Property.
A string (enum) representing a BiquadFilterType.
var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.type = 'lowpass';
See also: https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/type
Property. A string (enum) representing a BiquadFilterType. `var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter(); biquadfilter.type = 'lowpass';` See also: `https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode/type`
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