Class NotchFilter

A notch filter audio effector that attenuates a very narrow frequency band around a configurable center frequency. It is commonly used to remove resonances, hum (e.g. 50/60 Hz), or feedback frequencies without significantly affecting the rest of the spectrum.

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

Example

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

const notch = new NotchFilter({
    frequency: 50,
    q: 10
});

await notch.InitializeOnAttachment(audioContext);

---

Constructor

new NotchFilter(options?: Partial<NotchFilterOptions>): NotchFilter;

Arguments

• options?: Partial<NotchFilterOptions>
  Optional notch filter configuration options.

---

Properties

label: string | null

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

name: string

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

filterNode: BiquadFilterNode | null

Underlying Web Audio API filter node. Available after initialization.

---

Methods

InitializeOnAttachment(context: AudioContext): Promise<void>

Initializes the notch filter by creating a BiquadFilterNode with type = "notch" and applying the configured options.

Arguments

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

Returns

• Promise<void>

---

SetOptions(options: Partial<NotchFilterOptions>): void

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

Arguments

• options: Partial<NotchFilterOptions>
  Options to apply.

Returns

• void