Extract just the LFE (subwoofer) channel with FFmpeg:
: Ensure your input filename matches the actual file on your computer. If there are spaces in the name, wrap it in "quotes". the bay s01e05 ffmpeg
ffprobe -i TheBay_S01E05.mkv
ffmpeg -ss 90 -i TheBay_S01E05.mkv -c copy -avoid_negative_ts make_zero TheBay_S01E05_NoRecap.mkv Extract just the LFE (subwoofer) channel with FFmpeg: