LF Audio | Help Center

Troubleshooting

advanced

Device Not Found During Scan

Symptoms: Your LF Audio device doesn't appear in the Scan tab.

Solutions:

  • Make sure the device is powered on and not connected to another phone. Only one phone can be connected via Bluetooth at a time.
  • Move closer to the device. Bluetooth range is typically 10 to 30 feet, less through walls or metal enclosures.
  • On Android, ensure Location permission is granted. Android requires this for Bluetooth scanning. Without it, no devices will appear.
  • On iOS, ensure Bluetooth permission is granted. If you denied it, the app shows a full-screen "Bluetooth Permission Required" prompt with a one-tap link to open iOS Settings, where you can re-enable access.
  • Toggle Bluetooth off and on in your phone's system settings.
  • Force-close and reopen the AuralSync app.
  • Restart the LF Audio device by power cycling it.

Connection Drops or Keeps Reconnecting

Symptoms: The device connects briefly then disconnects, or shows "Reconnecting..." frequently.

Solutions:

  • Move closer to the device to improve signal strength.
  • Check for interference from other Bluetooth or WiFi devices nearby.
  • Make sure only one phone is trying to connect to the device at a time.
  • If the device repeatedly connects and disconnects within seconds, this may indicate a stale Bluetooth bond (see below).

Pairing Failures and Stale Bonds

Symptoms: Pairing fails immediately, or the app shows a "Connection Problem" dialog after multiple rapid disconnects.

What's happening: Your phone has stored old Bluetooth pairing data (a "bond") that no longer matches the device. This often happens after a firmware update or factory reset on the device.

Solution:

  1. Open your phone's Bluetooth settings (not the AuralSync app).
  2. Find the LF Audio device in the list of paired devices.
  3. Tap Forget or Unpair.
  4. Go back to the AuralSync app and scan for the device again.
  5. Pair fresh when prompted.

You can also clear the bond from the device side: in the AuralSync app, open Device Settings > DEVICE > Common subtab and tap Clear Bluetooth Bonds. This tells the WVC to forget all saved pairings, which can resolve issues when the phone-side unpair alone doesn't help.

Tip

The app may show a "Connection Problem" dialog with a suggestion to clear the bond. Follow the on-screen instructions; they walk you through the same process.

Firmware Update Failures

Symptoms: The update progress bar stops, the update fails, or the device becomes unresponsive during an update.

Solutions:

  • Keep the device powered on throughout the entire update. Do not turn off the device or disconnect the battery.
  • Stay close to the device. Keep your phone within a few feet during the transfer.
  • Do not close the app during the update.
  • If the update fails mid-transfer over Bluetooth, retry it. The device is designed to safely handle interrupted updates.
  • If a WiFi update fails, try Install with Bluetooth as a fallback, or verify the device can reach the WiFi network from its WiFi settings.
  • If the device seems stuck after an update, power cycle it (turn off, wait 10 seconds, turn back on).
  • If the device does not recover after a power cycle, contact LF Audio support.

Recording Session Ended Unexpectedly

Symptoms: A recording you didn't stop manually appears with a status other than just "ended", such as "BLE timeout" or "app closed".

What's happening: Recording sessions need the app running and the device connected. Common reasons a recording ends on its own:

  • BLE timeout: the Bluetooth connection went silent for too long (about 60 seconds). The most common cause is the device going out of range or being powered off.
  • app closed: your phone closed the app to save battery, or you swiped it away from the app switcher.
  • disk full: your phone ran out of local storage for buffering samples between uploads.
  • upload failed: the final batch of samples couldn't reach the cloud (typically a network problem at the moment of upload).

In every case, what was captured up to that point is preserved. To reduce the chance of an unexpected end:

  • Keep the app in the foreground while recording, or enable Settings > Keep Connected in Background so the OS does not close the app for inactivity.
  • Stay in Bluetooth range of the device.
  • Free up some local storage on your phone before long recording sessions.

See Recording Sessions for the full session lifecycle.

Symptoms: You entered your email and tapped Send sign-in link, but no email arrived, or the link in the email doesn't open the app.

Solutions:

  • Check your spam or promotions folder. The link is sent from a no-reply address and some providers route it aggressively.
  • Wait a minute. Magic-link delivery can take a few seconds depending on your email provider.
  • If the email arrived but the link doesn't open the app, copy the 6-digit fallback code shown in the same email and paste it into the in-app sign-in screen.
  • As a last resort, try Continue with Google or Continue with Apple instead. Both reach the same account if the email matches.

See Account and Sign-In for the full sign-in workflow.

Missing Settings Tabs

Symptoms: You don't see the Channel Groups, Mesh Network, Knob Management, or Smart Home subtabs.

Cause: These features require specific minimum firmware versions:

Subtab Minimum Firmware
Mesh Network Always shown (Add Unit requires 3.6.0)
Knob Management 3.6.0
Channel Groups 3.8.0
Smart Home 3.9.0

Solution: Update your device's firmware to the latest version. See Firmware Updates.

Note

Both the primary CPU (CPU1) and the secondary CPU (CPU2) must meet the minimum version. The app checks both before showing these subtabs.

No Data Showing on Graphs

Symptoms: The device is connected but graphs are empty or show flat lines.

Solutions:

  • Check that the relevant channels are enabled (tap a channel name on the graph to open the Edit Channel dialog).
  • Make sure the device has power input. Voltage sensors need a live signal to display.
  • For FFT and oscilloscope data (WVC PRO / SSA): audio signal must be passing through the device's inputs.

App Permissions Issues

Android

Symptoms: The app can't scan, connect, or send notifications.

Required permissions:

  • Bluetooth: required for device communication
  • Location: required by Android for Bluetooth scanning (the app does not track your location)
  • Notifications (optional): needed for background firmware update alerts, chat replies, and warranty / RMA status

If you denied a permission, go to Android Settings > Apps > AuralSync > Permissions and grant the missing permissions.

iOS

Symptoms: The app shows a "Bluetooth Permission Required" screen and cannot scan for devices.

Required permissions:

  • Bluetooth: required for device communication
  • Notifications (optional): needed for chat replies and warranty / RMA status updates

If you denied a permission, tap the on-screen button to open iOS Settings, then enable AuralSync's Bluetooth (and Notifications, if you want them) access.

Contact Support

If none of the above solutions resolve your issue, contact LF Audio support: