# TRTCSystemVolumeTypeAuto property Null safety

int TRTCSystemVolumeTypeAuto
final

"Call volume with mic and media volume without mic", i.e., the call volume mode will be used when the anchor mics on, while the media volume mode will be used when the audience user mics off. This is suitable for live streaming scenarios.
If the scenario you select during `enterRoom` is `TRTC_APP_SCENE_LIVE` or `TRTC_APP_SCENE_VOICE_CHATROOM`, the SDK will automatically select this mode.

## Implementation

    /// If the scenario you select during `enterRoom` is `TRTC_APP_SCENE_LIVE` or `TRTC_APP_SCENE_VOICE_CHATROOM`, the SDK will automatically select this mode.
    static final int TRTCSystemVolumeTypeAuto = 0;