Translation: Audio filter, stereo (forces mono -> stereo, just in case) , compander (compressor/expander), attack 0, release 1, -90 dB in, infinity out, -70 dB in, -70 dB out, -30 dB in, -9 dB out, 0 dB in, -3 dB out, soft knee 6, 0 dB makeup gain, input level 0 dB, lookahead 0. 'compand=0 0:1 1:-90/-900 -70/-70 -30/-9 0/-3:6:0:0:0' Specifically made for 'whisper+explosion' scenes (personal recipe). 'compand=.3|.3:1|1:-90/-60|-60/-40|-40/-30|-20/-20:6:0:-90:0.2' 'aformat=channel_layouts=stereo, compand=0 0:1 1:-90/-900 -70/-70 -30/-9 0/-3:6:0:0:0' volume=6dB' 'compand=.13|.13:.35|.35:-70/-35|-35/-20|-20/-15|-15/-15:6:-3.01:-90:0.2' |