First, position the microphone correctly: 15–30 cm from participants, away from reflective surfaces. Set the signal level so that the visual indicators of the video conferencing software show activity in the mid-range. Turn on moderate noise cancellation and high-pass filters to eliminate air conditioning, traffic, or other low-frequency interference. Turn off automatic gain control in the software, if your microphone has one, and adjust the echo cancellation to suit the room acoustics.