Troubleshoot Koine.

It broke in the middle of an event

1. Do not choose End event. Ending disconnects every listener and retires the event code. Leave it live, or choose Pause, while you fix it.
2. Look at the input level meter in Booth. If it is flat, check the mixer send, the cable and the device selected under Audio input.
3. If Booth says listeners hear silence or no sound is going out, choose Resume audio or Resume capture, whichever it shows.
4. Check the internet on the Booth computer. If it shows Reconnecting, wait for it to clear, or plug in a network cable or switch networks.
5. If Booth froze or closed, reopen it, open the same event from My events and choose Open live booth. Choose Resume audio if asked. The event code stays the same, so listeners keep the same QR.
6. Listener phones reconnect on their own. If a phone stays stuck, tap the status dot and choose Try again or Gear → Refresh, or scan the QR code again.
7. Tell the room that captions and translated audio will be back in a moment, and that nobody needs to do anything unless their phone stays stuck.

Booth cannot see the microphone or interface

• Allow microphone access in macOS or Windows privacy settings.
• Return to Audio and choose Allow mic and refresh inputs.
• Reconnect the USB interface and select it by name instead of Default system input.
• Close another application if it has taken exclusive control of the input.

The input meter does not move

• Confirm the right device under Audio input and the right Audio source.
• Check mixer routing, gain, mute and USB return channels.
• Test with normal speech, not background room noise.
• If using a virtual input, confirm the other application is routed into it.

The event is live, but listeners hear silence

• In Booth, check that the source meter is moving.
• Resume the event if it is paused.
• Respond to capture suspended, device disconnected or off-the-air warnings.
• If Booth refreshed while live, choose Resume audio.
• On the phone, tap Start listening and open Gear → Audio to enable Sound.
• Check phone volume and earbuds.

No captions appear

• Confirm the event is live and speech is reaching Booth.
• Confirm the listener selected a language.
• If the listener page says Planned, Waiting or Microphone paused, the booth has not started audio or has paused it.
• Open the listener status dot to check Phone network, Booth and Live captions.

A language is missing

On the listener phone, open the language pill and choose Request language. The request remains pending until the booth approves it. In Booth, confirm the language is in the live language bar and read any warning shown next to it.

The QR code says nothing is live

A permanent room or organization QR can be between events. Wait for the booth to go live or enter the current event code. For a one-event QR, confirm that Booth is running the same event and that the event has not ended.

Share only the QR code or link Booth shows under Invite listeners, and test that exact link on a real phone before you print it.

The listener feed stopped

• Tap the status dot and identify which connection is offline.
• Choose Try again or Gear → Refresh.
• Switch between venue Wi-Fi and mobile data.
• Open the link in Safari or Chrome instead of Facebook or Instagram's built-in browser.

Translated audio echoes in the room

Use earbuds and keep the phone speaker off. Move listener phones away from the booth microphone or room-audio input.

The projector, overlay or browser source is missing

• Confirm the operating system detects the projector as a separate display.
• Reopen Screen setup after connecting the display.
• Confirm the event is live and screen settings were saved.
• Preview the exact screen link.
• Keep browser sources at 1920×1080 and above the program source.
• If a floating overlay is hidden by exclusive fullscreen, use windowed presentation mode or direct second-screen output.

A recording does not appear

• Confirm organization recording consent was enabled.
• Confirm the event policy was not Live only.
• End the event normally and wait about 90 seconds.
• Open Recordings in Platform as an owner or administrator.

Sign-in or access problems

• Use the same identity and invited email each time.
• Open a team invitation before signing in if you have not joined the organization yet.
• Use Forgot password for an email/password account.
• Ask an administrator to confirm your role, event scope or room assignment.
• SSO appears only when the organization has configured it.

Still stuck?

Contact Koine support and include the event code, computer operating system, Booth version, input device and what the status indicator says. Do not include passwords or private API keys.