# Achieve high audio quality (/en/realtime-media/rtc/build/enhance-the-audio-experience/best-practices-sound-quality/web)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

Some use-cases, such as karaoke sessions, podcasts, and performance-based chats, require a high-quality audio experience. This page shows you how to achieve clear high-definition audio, without noise or interference in your app.

## General settings

To improve the audio quality experience, consider the following:

### Using default audio encoding

Call [`createMicrophoneAudioTrack`](https://api-ref.agora.io/en/video-sdk/web/4.x/interfaces/iagorartc.html#createmicrophoneaudiotrack) and in `encoderConfig` pass `"high_quality_stereo"`, RTC SDK's built-in audio encoding configuration. It uses a 48 kHz sampling rate, music encoding, two channels, and the maximum encoding rate is 128 Kbps.

```javascript
AgoraRTC.createMicrophoneAudioTrack({
 encoderConfig: "high_quality_stereo"
}).then(/**...**/);
```

### Custom audio encoding

Use the following code example to customize audio encoding properties. This example sets a 48 kHz sampling rate, music encoding, two-channel usage, and a maximum encoding rate of 128 Kbps.

```javascript
AgoraRTC.createMicrophoneAudioTrack({
 encoderConfig: {
  sampleRate: 48000,
  stereo: true,
  bitrate: 128,
 },
}).then(/**...**/);
```

## Sound card settings

This section only applies to users using sound cards.

### Disable 3A

RTC SDK turns on 3A by default. In audio processing, 3A stands for Acoustic Echo Cancellation (AEC), Active Noise Suppression (ANS), and Automatic Gain Control (AGC). Sound card devices usually provide some built-in audio processing, such as echo and noise cancellation. Currently, if 3A is enabled in the application layer, it may cause over-processing of the audio signal and interference between different algorithms may impact sound quality. Best practice is that users with sound cards disable 3A by calling [`createMicrophoneAudioTrack`](https://api-ref.agora.io/en/video-sdk/web/4.x/interfaces/iagorartc.html#createmicrophoneaudiotrack).

```javascript
AgoraRTC.createMicrophoneAudioTrack({
 AEC: false, // Turn off echo cancellation
 AGC: false, // Turn off gain control
 ANS: false, // Turn off noise reduction
}).then(/**...**/);
```