Drop mono .ogg (Vorbis) files here with these exact names:

  scanning.ogg   - played when the tracker starts scanning someone
  locked.ogg     - target locked
  close.ogg      - marked target within 10 blocks
  kill.ogg       - marked target died
  expired.ogg    - mark timed out / signal lost
  reload.ogg     - pistol reloaded

Add more variants by listing extra files in sounds.json, e.g. "voice/locked_2".
