RNN noise suppression plugin

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Overview

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Installation

npm i @seastart/srtc-web-sdk @seastart/srtc-plugin-rnnoise

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Host the static assets

• rnnoise-runtime.js
• rnnoise-processor.js
• rnnoise-processor.wasm

cp node_modules/@seastart/srtc-plugin-rnnoise/assets/* public/rnnoise/

In Vite projects you can also copy them automatically at build time with vite-plugin-static-copy.

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Usage

import { SRTC } from "@seastart/srtc-web-sdk";
import { RnnoiseProcessor } from "@seastart/srtc-plugin-rnnoise";

const srtc = new SRTC();

// 1. Create the microphone track and start capture
const mic = srtc.createLocalMicTrack();
await mic.startCapture({ deviceId });

// 2. Enable noise suppression (basePath points to the directory hosting the assets from the previous step)
await mic.setProcessor(new RnnoiseProcessor({ basePath: "/rnnoise/" }));

// 3. Publish
await srtc.publishLocalTrack(mic);

await mic.removeProcessor();

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Options

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Trade-offs vs. native noiseSuppression

For low-end devices or scenarios with little noise, keep using the native noiseSuppression of createLocalMicTrack; for strong noise and high call-quality requirements, use this plugin.

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Notes

• Supports audio tracks only.
• Must run over HTTPS (or localhost); AudioContext may need a user gesture before it can resume.
• The sample rate is fixed at 48 kHz.
• After switching the microphone device (changeDeviceId) or calling startCapture again, noise suppression resumes automatically; you don’t need to call setProcessor again.
• Can be chained with other processors; see Audio/video processors.