Voice activity detection
Understand voice activity detection in Vivox.
Read time 2 minutesLast updated 8 months ago
Voice activity detection detects the presence or absence of speech in an application. In most cases, customers do not need to adjust the default voice activity detection (VAD) settings of the Vivox SDK. Before manually tuning the VAD settings, test your setup using Automatically Adjusted VAD. Automatically Adjusted VAD is better at detecting a player speaking than the default VAD settings.
Note
Use when a player uses the onboard microphone and speakers on PCs and mobile devices. Players using high-quality Bluetooth earbuds, headsets or USB headsets might not benefit from as many of those devices have built-in noise reduction or directional microphones that already produce a clean voice signal.
vad_autovad_autoSet to 1 in the call to enable automatic adjustment. See the example shown below to enable :
vad_autovx_req_aux_set_vad_propertiesvad_autovx_req_aux_set_vad_properties_t *req;vx_req_aux_set_vad_properties_create(&req);req->vad_hangover = 2000;req->vad_sensitivity = 43;req->vad_noise_floor = 576;req->vad_auto = 1;vx_issue_request(&req->base);
Note
Although the VAD ignores the other settings when is enabled, you must provide valid parameters or the call will return an error. This example provides the default values for the , , and .
vad_autovad_hangovervad_sensitivityvad_noise_floorIf the Automatically Adjusted VAD does not help, disable by setting it to 0 and provide values for , , and .
vad_autovad_hangovervad_sensitivityvad_noise_floorNote
Changes to the VAD noise floor settings do not affect currently joined channels. If the ability to change VAD settings is available to the end-user, indicate that noise floor changes only take effect in the next voice session or only allow changing the noise floor channel when the client is not in-channel.