Feedback and echo in the recording can happen if your microphone is picking up sound from your Mac's speakers. There are a few ways to prevent this:

  1. Move the microphone further away from the speakers. 
  2. Reduce the Mac speaker volume. 
  3. To eliminate any echo or feedback effect completely, use headphones or a headset instead of the Mac's built-in speaker.
  4. Keep in mind that an echo can also originate on the caller's end if they are running into the same situation.
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