When you set the volume of a device, you set either the in-call volume or the media volume.

• In-call volume: During an audio or video call, you set the in-call volume.
• Media volume: When you play background music, video or games, you set the media volume.

The differences between the two are as follows:

• In-call volume features acoustic echo cancelling, and should always be above 0.
• Media volume features quality sound performance, and can be set 0.

The SDK provides six audio scenarios with the setAudioProfile method: CHATROOM_ENTERTAINMENT, EDUCATION, GAME_STREAMING, SHOWROOM, CHATROOM_GAMING and DEFAULT.

• If you set scenario to GAME_STREAMING, all users use the media volume.
• If you set scenario to EDUCATION, SHOWROOM or DEFAULT, audience users in the Live-broadcast profile use the media volume, while host users in the Live-broadcast profile and all users in the Communication profile use the in-call volume.
• If you set scenario to CHATROOM_ENTERTAINMENT and CHATROOM_GAMING, all users use the in-call volume.

Given the system restrictions, the media volume can be set to 0, but the in-call volume cannot. If you want to adjust the volume to 0, ensure that you set an audio scenario where the system uses the media volume.