Zend certified PHP/Magento developer

How to increase/decrease decibels of recorded audio tracks with FFmpeg?

I’m using the following command to record the desktop with FFmpeg, as well as two audio sources:

  • “virtual-audio-capturer”
  • “Microphone (Logitech USB Headset)”
ffmpeg -f gdigrab -i desktop -f dshow -i audio="virtual-audio-capturer"
-f dshow -i audio="Microphone (Logitech USB Headset)"
-filter_complex amix=inputs=2:duration=longest output.mp4

How can I increase the volume of “virtual-audio-capturer” by 10 decibels and decrease the volume of “Microphone (Logitech USB Headset)” by 10 decibels?