# How to turn off noise reduction, echo cancellation, and automatic gain control? (/en/api-reference/faq/integration/turn_off_3a_config)

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

If your classroom integrates or uses audio mixing or other tools, and you want to turn off noise reduction, echo cancellation, and gain control functions, add the following code to `packages/agora-classroom-sdk/src/infra/api/index.tsx`:

```typescript
 if (AgoraRteRuntimePlatform.Electron === AgoraRteEngineConfig.platform) {
      rtcSDKParameters = [
        { 'rtc.audio.aec.enable': false },
        { 'rtc.audio.agc.enable': false },
        { 'rtc.audio.ans.enable': false },
      ];
    } else {
      rtcSDKParameters = [
        {
          MEDIA_DEVICE_CONSTRAINTS: {
            audio: {
              autoGainControl: false,
              echoCancellation: false,
              noiseSuppression: false,
            },
          },
        },
      ];
    }
```

![1680084350900](https://web-cdn.agora.io/docs-files/1680084350900)