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Vivox Core SDK

Vivox Core SDK

Methods for setting audio levels

Learn how to set audio input levels.
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The Vivox SDK uses various methods for setting audio input levels. You can use these requests to set the render device and capture device level for a user, for specific users in a single session, for specific users in an entire session, or for every participant in every session. 
  • vx_req_session_set_participant_volume_for_me
    • Takes in the session handle for a session, the participant URI (as a char* string) for the target user, and the volume to set (between 0 and 100, with 50 acting as normal speaking volume).
    • The server sets the participant volume in the specified section to the indicated value for only the local user, and sends out a 
      vx_resp_session_set_participant_volume_for_me
      response.
  • vx_req_aux_set_speaker_level
    • Sets the incoming audio level for all sessions playing through the user’s output device.
    • Takes in an int for volume (between 0 and 100, with 50 acting as normal speaking volume), and then sets the volume of the user’s output device to that int.
  • vx_req_aux_set_mic_level
    • Sets the input device’s level.
    • Takes in a single int for volume (between 0 and 100, with 50 acting as normal speaking volume), and then sets the local user's input device volume in the Vivox SDK to that level.
  • vx_req_sessiongroup_set_focus
    • Focus on a single session group.
    • The audible volume of this group is raised relative to the channels that are not being focused on.
    • Takes in the session handle for the target session group to focus on, and then begins boosting all audio that is playing through that channel.
    • Use this with the session handle of a single session to undo this effect
    • Use this with a single session group to give all sessions in a session group equal priority and focus.
The following code displays an example implementation for setting both input and output audio levels: 
void SetMicrophoneVolume(int level){    vx_req_aux_set_mic_level_t *req;    vx_req_aux_set_mic_level_create(&req);    req->level = level;    vx_issue_request3(&req->base, &request_count);}void SetSpeakerVolume(int volume){    vx_req_aux_set_speaker_level_t *req;    vx_req_aux_set_speaker_level_create(&req);    req->level = level;    vx_issue_request3(&req->base, &request_count);}