in JS SDK.. where should be noise cancellation apply.. before publishing the track or after ?

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but its not working

Hey there! If you’re having trouble with noise cancellation not working in the LiveKit JS SDK, let’s walk through a few things together: 1. Browser Support: First, double-check if your browser supports the Krisp noise filter. You can use

isKrispNoiseFilterSupported()

to see if it’s compatible. Here’s a quick example:

import { isKrispNoiseFilterSupported } from '@livekit/krisp-noise-filter';

if (!isKrispNoiseFilterSupported()) {
  console.warn('Krisp noise filter is not supported in this browser');
}

1. Proper Initialization: Make sure the

KrispNoiseFilter

is set up correctly and applied to your

LocalAudioTrack

right after it’s published. Check out this snippet:

room.on(RoomEvent.LocalTrackPublished, async (trackPublication) => {
  if (trackPublication.track instanceof LocalAudioTrack) {
    const krispProcessor = KrispNoiseFilter();
    await trackPublication.track.setProcessor(krispProcessor);
    await krispProcessor.setEnabled(true);
  }
});

1. Deployment: Just a heads-up, enhanced noise cancellation with Krisp is available only on LiveKit Cloud, not on self-hosted setups. 2. Conflicts: Try to avoid turning on both client-side and server-side noise cancellation at the same time to prevent issues. 3. Track Status: You can check if noise cancellation is active by keeping an eye on the

enhancedNoiseCancellation

property of your

LocalAudioTrack

. If any of this feels unclear or you want me to help you step-by-step, just let me know—I’m here to help! Sources: Enhanced noise cancellation | LiveKit Docs | AI noise cancellation | LiveKit Docs | src/room/track/LocalAudioTrack.ts | Speech & Audio Processing | livekit/livekit_composite | DeepWiki | Understanding "silence detected on local audio track" warning

Can custom denoise processors also works in the same way?

Hey there! You can definitely use custom denoise processors just like the

KrispNoiseFilter

in the LiveKit JS SDK. The SDK lets you plug in your own audio processors using the

setProcessor

method on

LocalAudioTrack

, so you have full control to add your own audio processing magic. Here’s a quick example to show you how to apply a custom processor:

room.on(RoomEvent.LocalTrackPublished, async (trackPublication) => {
  if (trackPublication.track instanceof LocalAudioTrack) {
    // Apply your custom processor
    await trackPublication.track.setProcessor(customProcessor);
  }
});

Just a heads up: while the way you integrate is the same, custom processors can’t fully replicate the proprietary Krisp models or some of the advanced features like Background Voice Cancellation (BVC) — those are only available server-side in Python or Node.js. If you have any specific ideas or features you want to build with your custom processor, feel free to share! I’d be happy to help you figure out the best way to make it happen. Sources: Enhanced noise cancellation | LiveKit Docs | src/room/track/LocalAudioTrack.ts | components/room.tsx | components/room.tsx | Sources/LiveKit/Protocols/AudioCustomProcessingDelegate.swift