[FFmpeg-user] firequalizer: What is multichannel evaluation?

[Bernd Butscheidt]

Hello,

trying out some equalizer settings, I stepped over this part in the documentation of ffmpeg describing the firequalizer filter:

"multi
        Enable multichannels evaluation on gain. Default is disabled"

What is multichannels evaluation? And are the gain_entry settings applied to all channels with the default settings with multichannel sound? Like, e.g., when using the given example:

firequalizer=gain_entry='entry(100,0); entry(400, -4); entry(1000, -6); entry(2000, 0)'