Voice SDK Callbacks
| gvFilterCallback | Used to filter audio that has either been captured or is about to be played. Can also be used to monitor audio. |
| gvUnpluggedCallback | Called when a device has been unplugged. |
| gvFilterCallback | Used to filter audio that has either been captured or is about to be played. Can also be used to monitor audio. |
| gvUnpluggedCallback | Called when a device has been unplugged. |