# Manage media and devices (/en/realtime-media/voice/build/control-audio-and-devices/volume-control-and-mute/unity)
> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).
This page shows you how to configure volume settings for audio recording, audio playback, and for the playback of music files.
## Understand the tech [#understand-the-tech]
Agora Voice SDK supports adjusting the audio volume for both recording and playback to meet practical application use-cases. For example, during a two-person call, you can mute a remote user by adjusting the playback volume setting to 0.
The figure below shows the workflow of adjusting the volume.
**Volume adjust workflow**
**Playback** refers to transmitting an audio signal from a sender to a recipient, where it is played back through a playback device.
**Recording** refers to the process in which audio signals are captured by a recording device and then sent to the transmitter.
If you set the volume too high using the signal volume adjustment methods, it may lead to audio distortion on some devices.
## Prerequisites [#prerequisites-9]
Ensure that you have implemented the [SDK quickstart](../index.mdx) in your project.
## Implement volume control [#implement-volume-control-9]
Use one or more of the following volume control methods to adjust volume settings.
### Mute and unmute users [#mute-and-unmute-users-7]
To mute or unmute the local audio stream, call `MuteLocalAudioStream`:
```csharp
// Stop publishing the local audio stream
RtcEngine.MuteLocalAudioStream(true);
// Resume publishing the local audio stream
RtcEngine.MuteLocalAudioStream(false);
```
To mute or unmute a remote user, call `MuteRemoteAudioStream` with the `uid` of the remote user:
```csharp
// Stop subscribing to the audio stream of the remote user
RtcEngine.MuteRemoteAudioStream(remoteUid, true);
// Resume subscribing to the audio stream of the remote user
RtcEngine.MuteRemoteAudioStream(remoteUid, false);
```
To mute remote users without unsubscribing, set their [playback volume](#adjust-the-playback-volume) to `0`.
### Adjust the playback volume [#adjust-the-playback-volume-7]
Call `AdjustPlaybackSignalVolume` or `AdjustUserPlaybackSignalVolume` to adjust the volume of the audio playback signal.
```csharp
// Set the volume for all remote users' playback locally to 50
RtcEngine.AdjustPlaybackSignalVolume(50);
// Set the playback volume for the remote user with the uid of 12 locally to 50
RtcEngine.AdjustUserPlaybackSignalVolume(12, 50);
```
### Adjust the recording volume [#adjust-the-recording-volume-7]
Call `AdjustRecordingSignalVolume` to adjust the volume of the audio recording signal.
```csharp
// Adjust the recording signal volume to 50
RtcEngine.AdjustRecordingSignalVolume(50);
```
When configuring audio settings, it's essential to understand the default behavior and the options available. Here are the key points to keep in mind:
* The SDK defaults to a device volume of `85` when using the recording device to capture audio signals.
* A volume of `0` means mute, and a volume of `255` represents the maximum volume of the device.
* If the SDK detects that the recording volume is too low in the current environment, it automatically increases the volume of the recording device.
* The volume of the recording device directly influences the global volume of the device.
* If the default recording device volume does not meet your requirements, adjust it by regulating the signal amplitude captured by the microphone or sound card.
### Get volume information of users [#get-volume-information-of-users-8]
Voice SDK enables you to obtain the user IDs and corresponding volumes of the three users with the highest instantaneous volumes in a channel during the process of audio recording, mixing, and playback. You use the `OnAudioVolumeIndication` callback to obtain this information. A returned `uid` of `0` in the callback indicates the local user.
Call `EnableAudioVolumeIndication` to enable reporting of the users' volume in the callback.
```csharp
RtcEngine = Agora.Rtc.RtcEngine.CreateAgoraRtcEngine();
UserEventHandler handler = new UserEventHandler(this);
RtcEngineContext context = new RtcEngineContext(
_appID,
0,
CHANNEL_PROFILE_TYPE.CHANNEL_PROFILE_LIVE_BROADCASTING,
AUDIO_SCENARIO_TYPE.AUDIO_SCENARIO_DEFAULT
);
RtcEngine.Initialize(context);
// Set up listener callback
RtcEngine.InitEventHandler(handler);
// Enable volume indication
RtcEngine.EnableAudioVolumeIndication(1, 1, true);
class UserEventHandler : IRtcEngineEventHandler
{
// This callback is triggered at the interval set in EnableAudioVolumeIndication and reports the three users with the highest instant volume in the channel
public override void OnAudioVolumeIndication(
RtcConnection connection,
AudioVolumeInfo[] speakers,
uint speakerNumber,
int totalVolume
) { }
}
```
## Reference [#reference-9]
This section contains content that completes the information on this page, or points you to documentation that explains other aspects to this product.
### API reference [#api-reference-9]
* [`AdjustRecordingSignalVolume`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengine.html#api_irtcengine_adjustrecordingsignalvolume)
* [`AdjustPlaybackSignalVolume`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengine.html#api_irtcengine_adjustplaybacksignalvolume)
* [`AdjustUserPlaybackSignalVolume`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengine.html#api_irtcengine_adjustuserplaybacksignalvolume)
* [`AdjustAudioMixingPlayoutVolume`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengine.html#api_irtcengine_adjustaudiomixingplayoutvolume)
* [`OnAudioVolumeIndication`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengineeventhandler.html#callback_irtcengineeventhandler_onaudiovolumeindication)
* [`MuteLocalAudioStream`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengine.html#api_irtcengine_mutelocalaudiostream)
* [`MuteRemoteAudioStream`](https://api-ref.agora.io/en/video-sdk/unity/4.x/API/class_irtcengine.html#api_irtcengine_muteremoteaudiostream)
### Sample projects [#sample-projects-8]
Agora offers the following open-source sample project for adjusting recording, playback, and in-ear monitoring volumes for your reference:
* GitHub: [AudioMixing](https://github.com/AgoraIO-Extensions/Agora-Unity-Quickstart/tree/main/API-Example-Unity/Assets/API-Example/Examples/Advanced/AudioMixing)
### Frequently asked questions [#frequently-asked-questions-7]
* [How can I solve the problem of low volume?](/en/api-reference/faq/quality/audio_low)
### See also [#see-also-9]
* [Custom audio source](custom-audio.mdx)
* [Custom video source](/en/realtime-media/video/build/capture-and-render-video/custom-video)