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 10–30 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.
- 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 — often after a firmware update or factory reset on the device.
Solution:
- Open your phone's Bluetooth settings (not the AuralSync app).
- Find the LF Audio device in the list of paired devices.
- Tap Forget or Unpair.
- Go back to the AuralSync app and scan for the device again.
- Pair fresh when prompted.
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, retry it. The device is designed to safely handle interrupted updates.
- 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.
Missing Settings Tabs
Symptoms: You don't see the Channel Groups, Mesh Network, or Knob Management tabs.
Cause: These features require specific minimum firmware versions:
| Tab | Minimum Firmware |
|---|---|
| Mesh Network | 3.6.0 |
| Knob Management | 3.6.0 |
| Channel Groups | 3.8.0 |
Solution: Update your device's firmware to the latest version. See Firmware Updates.
Both the primary CPU (CPU1) and the secondary CPU (CPU2) must meet the minimum version. The app checks both before showing these tabs.
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 in the device's App Settings tab.
- Make sure the device has power input (voltage sensors need a live signal to display).
- For FFT and oscilloscope data (PRO only): 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
If you denied a permission, go to Android Settings > Apps > AuralSync > Permissions and grant the missing permissions.
Contact Support
If none of the above solutions resolve your issue, contact LF Audio support:
- Help Center: help.lf-audio.com
- Contact: lf-audio.com/pages/contact