Viewer Mirror setup (LAN)
Viewer Mirror runs a small web server on the LTCast machine so crew members on the same Wi-Fi can open a browser and see live timecode, the current song, upcoming cues and lyrics — no app installation required.
Pro. Hosting the mirror needs Pro (a Pro licence or an active trial). Without Pro the Host controls in Settings are dimmed, and switching the mirror on only shows a message that it is a Pro feature. Opening the viewer page on a phone, and connecting another LTCast as a viewer, do not need Pro on the viewing side.
Enabling the mirror
Go to Settings → Network Viewer → Host (Mirror) and tick Enable network viewer mirror. The mirror starts immediately. The tab then shows Running on port 7777, the list of LAN addresses viewers can open, and how many viewers are connected. The MIRROR pill in the status bar lights up (with the viewer count once someone has connected), and the HOLD button and the Stage Monitor's alert form become available.
The mirror is off by default. The setting is remembered, so a mirror that was on when you quit starts again when LTCast launches (with a new PIN). If it cannot start — for example the port is taken, or the session is not Pro — the box unticks itself and the reason is shown.
Port configuration
The default port is 7777; any port from 1024 to 65535 is allowed. If another application is already using the port, type a different one in the Port field. You do not need to switch the mirror off and on: if you change the port, or toggle Require PIN, while the mirror is running, LTCast restarts the server itself on the new setting. Viewers must then open the new address, and a restart also creates a new PIN (see Sharing URL & PIN).
Firewall prompts
On the first launch, the operating system may ask for permission to accept incoming connections:
- macOS: a dialog appears asking "Do you want LTCast to accept incoming network connections?" — click Allow. If you clicked Don't Allow, re-enable access in System Settings → Privacy & Security → Local Network.
- Windows: Windows Defender Firewall may show a prompt — allow access on Private networks at least. If you dismissed the prompt, open Windows Defender Firewall → Allow an app through firewall and add LTCast manually.
Sharing the viewer URL
Under Viewer URLs (LAN) LTCast lists the address of every network interface it found (for example http://192.168.1.5:7777/). Crew members open one of these in a browser on any phone, tablet or laptop connected to the same Wi-Fi network. Click an address to open it on this computer, or click Copy first URL to copy the primary address for pasting into a group chat. The list is read when you open the tab and when you switch the mirror on, so if you change networks, switch it off and on again to refresh it.
The mirror uses plain HTTP and is for the local network only. Do not expose port 7777 to the internet or to untrusted networks. Use Cloud Share (Pro) for access from outside the building.
What viewers can do
The viewer page is read-only: crew cannot start, stop or change anything in LTCast. They can send status reports and acknowledge alerts back to you. See What crew members see.