can you tell more about live noise cancellation methods ?

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how to enable default "*Default WebRTC Noise & Echo Cancellation*"

Hey there! If you want to enable the default WebRTC-based noise and echo cancellation in LiveKit, you can set up the

AudioCaptureOptions

when you connect to a room or capture audio. Most SDKs have these settings turned on by default, but just in case you want to customize, here are some handy examples: • JavaScript SDK: The defaults are already set to

true

, but you can explicitly configure them like this:

await room.connect(url, token, {
  audioCaptureDefaults: {
    echoCancellation: true,
    noiseSuppression: true,
    autoGainControl: true
  }
});

• Android SDK: These are enabled by default, but if you want to tweak:

val options = LocalAudioTrackOptions(
  echoCancellation = true,
  noiseSuppression = true
)

• Flutter SDK: The defaults include

noiseSuppression: true

and

echoCancellation: true

. • Swift SDK: On real devices, you might need to turn on WebRTC-based processing explicitly since it defaults to Apple’s Voice-Processing I/O. • Python SDK: You can enable it explicitly when creating an `AudioProcessingModule`:

apm = AudioProcessingModule(
  echo_cancellation=True,
  noise_suppression=True
)

If you have any questions or want help with a particular SDK or setup, just give me a shout—I’m here to help! Sources: src/room/defaults.ts | livekit-android-sdk/src/main/java/io/livekit/android/room/track/LocalAudioT... | Sources/LiveKit/Types/Options/AudioCaptureOptions.swift | livekit-rtc/livekit/rtc/apm.py | AI noise cancellation | LiveKit Docs

Enhanced AI Noise Cancellation: how to work this

Hey there! Just wanted to share how you can set up Enhanced AI Noise Cancellation in LiveKit, either right on the frontend (outbound) or on the server side (inbound), depending on what fits your needs best: 1. Frontend (Outbound) Implementation This lets you apply noise cancellation directly to the audio coming from the participant's device. You can use this on Web, Swift, Android, Flutter, and React Native. • For Web: First, install the noise filter package: `npm install @livekit/krisp-noise-filter`Then, apply the filter whenever a local microphone track is published:

room.on(RoomEvent.LocalTrackPublished, async (trackPublication) => {
  if (trackPublication.source === Track.Source.Microphone && trackPublication.track instanceof LocalAudioTrack) {
    const { KrispNoiseFilter, isKrispNoiseFilterSupported } = await import('@livekit/krisp-noise-filter');
    if (!isKrispNoiseFilterSupported()) {
      console.error("Krisp noise filter not supported in this browser");
      return;
    }
    try {
      await trackPublication.track.setProcessor(KrispNoiseFilter());
    } catch (e) {
      console.warn("Could not enable noise filter");
    }
  }
});

• React Components: If you’re using React, the

useKrispNoiseFilter

hook makes things super easy:

import { useKrispNoiseFilter } from '@livekit/components-react/krisp';

const krisp = useKrispNoiseFilter();
return (
  <button onclick={() => krisp.setNoiseFilterEnabled(true)}>
    Enable Enhanced Noise Cancellation
  </button>
);

2. Server-Side (Inbound) Implementation This one applies noise cancellation on the server for incoming audio, which is great if you’re working on voice AI apps. It’s supported on Python and Node.js. • For Python: Just install the package: `pip install "livekit-plugins-noise-cancellation~=0.2"`Then enable noise cancellation when you start your agent session:

from livekit.plugins import noise_cancellation

await session.start(
  room_input_options=room_io.RoomInputOptions(
    noise_cancellation=noise_cancellation.BVC(),  # or NC(), BVCTelephony()
  ),
)

If you want a hand with a specific platform or have any questions, just let me know—I’m here to help! Sources: packages/react/src/hooks/cloud/krisp/useKrispNoiseFilter.ts | AI noise cancellation | LiveKit Docs | Noise & echo cancellation | LiveKit Docs | Enhanced noise cancellation | LiveKit Docs | components/room.tsx