Intercom & Two-Way Audio
Learn how to use the high-fidelity intercom system to communicate through your supported webcams and compatible audio hardware.
Important Ecosystem Note: TP-Link Tapo and VIGI cameras only support intercom/2-way talk features directly through their official Tapo or VIGI mobile applications. They do not support RTSP backchannels or local intercom streams through third-party software like OpticLink.
1. How the Intercom Works
The system uses the RTSP Backchannel protocol to send audio from your computer's microphone directly to the camera's built-in speaker. Unlike traditional push-to-talk systems, our implementation uses a modern AudioWorklet architecture to ensure minimal latency and crystal-clear 44.1kHz capture.
2. Using the Intercom
- Activate: Click the Microphone icon in the camera overlay.
- Feedback: Look for the pulsing "TALKING..." indicator in the camera header. This confirms your voice is being broadcast.
- Microphone Selection: Ensure your default Windows recording device is set to the microphone you wish to use.
3. Technical Specifications
| Specification | Detail |
|---|---|
| Sample Rate | 44,100 Hz (CD Quality) |
| Bit Depth | 16-bit PCM (Linear) |
| Capture Architecture | Low-Latency AudioWorklet (Dedicated Thread) |
| Transmission Codec | G.711 A-law (Industry Standard) |
4. Best Practices
Positioning
Ensure your computer speakers are not too loud while using the intercom to prevent acoustic feedback (echo) at the camera's location.
Network Stability
Two-way audio requires a stable upload speed. If your intercom audio is "choppy," try switching to a wired Ethernet connection for your PC.
5. Troubleshooting
- No Sound at Camera: Verify that "Camera Account" permissions allow for audio backchannel access.
- Permission Denied: Ensure Windows has granted the app permission to access the Microphone in Settings > Privacy > Microphone.
- Low Volume: Check the microphone input gain in the Windows Sound Control Panel.