# TRTC_APP_SCENE_AUDIOCALL property Null safety

int TRTC_APP_SCENE_AUDIOCALL
final

In the audio call scenario, 48 kHz dual-channel audio call is supported. A single room can sustain up to 300 concurrent online users, and up to 50 of them can speak simultaneously.
Use cases: `one-to-one audio call`, `audio conferencing with up to 300 participants`, `voice chat`, `online Werewolf`, etc.

## Implementation

    /// Use cases: [one-to-one audio call], [audio conferencing with up to 300 participants], [voice chat], [online Werewolf], etc.
    static final int TRTC_APP_SCENE_AUDIOCALL = 2;