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No Audio Recorded

Problem: No Audio Recorded

Symptom: Recording file is silent or shows flat waveform

Run the diagnostic flowchart above. Most common causes:

  1. Computer has MONO input (most common)
  2. Run scanner: https://recapmycalls.com/audio/

  3. Solution: USB adapter needed - details here

  4. Audio input gain too low/muted

  5. Windows: Right-click speaker icon → Recording devices → Microphone → Properties → Levels → Set to 100%
  6. Mac: System Preferences → Sound → Input → Drag slider all the way right

  7. Speak into headset - do you see level meter moving?

  8. Headset incompatible with phone

  9. Test headset directly with phone (no RECAP)

  10. Old headsets from drawers often don't work

  11. Connected to LINE IN instead of MIC IN

  12. LINE IN has no bias voltage, won't power RECAP

  13. Look for port with microphone icon or pink color

  14. Wrong input device selected in software

  15. Check recording software settings
  16. Select "RECAP" or "External Microphone"