Class LowPassFilter

A low-pass filter audio effector that attenuates frequencies above a configurable cutoff frequency. It is commonly used to remove high-frequency content, smooth signals, or create filter sweeps.

Internally this effector is based on the Web Audio API BiquadFilterNode with lowpass type.

Example

import { LowPassFilter } from "@fluex/fluexgl-dsp";

const lowPass = new LowPassFilter({
    frequency: 1200,
    q: 0.7
});

await lowPass.InitializeOnAttachment(audioContext);

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Constructor

new LowPassFilter(options?: Partial<LowPassFilterOptions>): LowPassFilter;

Arguments

• options?: Partial<LowPassFilterOptions>
  Optional low-pass filter configuration options.

---

Properties

label: string | null

Custom label for this effector. Defaults to "LowPassFilter".

name: string

Internal name for this effector. Defaults to "LowPassFilter".

filterNode: BiquadFilterNode | null

Underlying Web Audio API filter node. Available after initialization.

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Methods

InitializeOnAttachment(context: AudioContext): Promise<void>

Initializes the low-pass filter by creating a BiquadFilterNode with type = "lowpass" and applying the configured options.

Arguments

• context: AudioContext
  The audio context used to construct the filter node.

Returns

• Promise<void>

---

SetOptions(options: Partial<LowPassFilterOptions>): void

Applies filter parameters such as cutoff frequency and Q factor. Live-updates the internal BiquadFilterNode when available.

Arguments

• options: Partial<LowPassFilterOptions>
  Options to apply.

Returns

• void