0: The Communication profile. Use this profile in one-on-one calls or group calls, where all users can talk freely.
2: The Gaming profile. This profile uses a codec with a lower bitrate and consumes less power. Applies to the gaming scenario, where all game players can talk freely.
1: The Live-Broadcast profile. Users in a live-broadcast channel have a role as either host or audience. A host can both send and receive streams; an audience can only receive streams.