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Support

Help for Liink Server and the free Apple and Android clients.

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Quick start

1. Open the dedicated Liink Server app on a Mac. It opens with your saved setup as a single launch card.
2. Choose Edit settings to set the server name, port and access, then press Start server. Next time, Start server (or Return) is all it takes.
3. Open the free Liink client on Mac, iPhone, iPad, Android phone or Android tablet.
4. In Server settings, create a one-time invitation for the route the client will use and paste it into the client. The device remains paired until revoked.
5. Use assigned channels to talk and adjust personal listen-line and master levels.

Server and client apps

Liink Server is macOS-only and cannot join another server as a client. The free Liink apps for Apple and Android are client-only and cannot host a system. This separation gives the server the hardware and incoming-network permissions it needs while keeping crew apps simple.

A Windows client is in development and is not available yet.

The Routing page

While the server is running, switch between Dashboard and Routing in the window's toolbar. The Routing page is one matrix: a row for each user when Access is set to Users, otherwise a row for each paired or connected device, and a column for each talk channel and listen line.

• Click a crosspoint to route that person to the channel or line, or to remove them.
• Click a column header to open the channel's or line's settings.
• Right-click a connected person to mute, unmute or kick them.
• A column with no named members is open to everyone and shows ALL. Liink won't let you remove the last member of a column, because an empty column would open it to everyone.
• The Hardware row shows each channel's physical output and each listen line's audio source. A warning triangle marks a source with a problem; hover over it to see the reason.

Audio-interface routing

Route an input to a listen line

1. Open the listen line's settings on Liink Server.
2. Select the Core Audio device under Input.
3. Select the discrete Input channel, such as Input 1 or Input 2.
4. Save and confirm that the line meter responds.

Route a talk channel to a physical output

1. Open the talk channel's settings.
2. Under Physical audio output, select the device and output channel.
3. Set output gain and save. All authorised talkers on that channel are mixed to the selected output.

Several routes may use one interface, and Liink Server can open multiple output devices at the same time.

Audio from a video input

A listen line with video can take its audio from the same input as the picture.

1. Open the listen line's settings, turn on Has video and choose the Camera.
2. Under Audio, set Source to Audio from video input. The option appears only while the line has video.
3. For a Blackmagic Design DeckLink input, choose the Embedded channel. The range offered (1–2, 1–8 or 1–16) depends on the card.
4. For a UVC capture dongle, Liink shows the audio device that belongs to the camera. Choose its Input channel.

If Liink shows No audio found for …; pick the audio input manually, it could not find a single matching audio device. Set Source back to Audio input device and choose the interface yourself. Liink never falls back to the built-in microphone.

Liink audio is 48 kHz mono, so one channel is sent per line. If you turn video off, the line goes back to its saved audio input device.

Video inputs

Webcams and UVC capture interfaces appear in the listen line's Camera menu. Where a driver exposes several input sources, use Connector to select the required one.

Blackmagic Design DeckLink devices require the Blackmagic Design Desktop Video driver. Multi-input cards must be set to a profile with the required active subdevices in Desktop Video Setup. Each active subdevice then appears as an independent Liink video source. Liink uses capture input only; it does not require a DeckLink video output.

Unplugging hardware

Liink Server watches for audio interfaces, cameras and DeckLink cards being connected and disconnected. When a device disappears, its routes stop, and the listen line or the status bar shows what is missing. Routes on other devices keep running.

When the same device is connected again, Liink reopens its routes automatically. It recognises the device by its stable ID and never puts a different device in its place. If a route stays down, click the yellow retry button in the status bar to rebuild every audio and video route.

Troubleshooting

Collect connection diagnostics

Liink writes privacy-safe connection and media lifecycle events without credentials or media content. On Apple platforms, reproduce the issue and export the relevant entries from Console.app. On Android, capture the LiinkConnection tag with Android Studio Logcat. Include the log with the device and OS version in your support email.

The server does not appear

Confirm that the Mac server and client are on the same Wi-Fi/LAN and that local-network permission is enabled. Guest networks and some VLANs block Bonjour. In that case, use Manual connection and enter the server Mac's IP address with port 9933 unless you changed it.

A manual, Tailscale or Public Direct connection has no audio

Liink uses encrypted TCP 9933 for signaling and encrypted UDP 9934 for media by default. If the signaling port changes, media always uses the next port. Make sure both are allowed by the Mac firewall, tailnet policy or router. Signaling without audio almost always means the UDP port is blocked.

Public Direct does not connect

Give the server Mac a stable LAN address, then forward the same external and internal TCP signaling port and the following UDP media port to that address. Enter the router's public IPv4 address or DNS name under Public Direct; do not assign that address to the Mac. Test from mobile data because some routers lack NAT loopback. Public Direct cannot work behind CGNAT without a public address from the ISP; use Tailscale in that case.

The client reports that the server identity changed

Stop and compare the fingerprint with Server settings on the Mac. The warning can indicate the wrong server or an intercepted route. Only after an intentional server identity replacement should the old device pairing be revoked and a new invitation created.

An audio device or channel is unavailable

Connect and power the interface, and confirm that macOS Audio MIDI Setup sees every expected input and output. Liink reopens the route by itself when the saved device returns. If it doesn't, click the yellow hardware retry button in Liink Server. Liink intentionally does not fall back to the built-in microphone when a saved interface is missing.

A DeckLink source does not appear

Install or update Blackmagic Design Desktop Video, confirm that Desktop Video Setup sees the card, and choose a profile that exposes the required subdevices. Close any application already using the input, then retry hardware in Liink Server or restart the server session.

A DeckLink line says “No signal on the DeckLink input”

The card is present but receives no video on that input. Check the source device and the SDI or HDMI cable. The message clears by itself when a signal arrives.

Audio is choppy, delayed or echoing

Prefer a wired connection for the server Mac and a production-grade access point for wireless clients. Headsets reduce acoustic feedback. Liink applies voice processing on clients, but open speakers in the same room can still create echo; use PTT where necessary.

Privacy

Liink operates without Oclin accounts, analytics or media servers. Live production audio and video stay between the devices and network paths you configure. Read the full privacy policy.