FFmpeg compander

ffmpeg -ac 1 -f alsa -i plughw:2 -filter_complex "compand=attacks=0:points=-30/-900|-20/-20|0/0|20/20" -f alsa plughw:2

I gave up trying to work out sox but ffmpeg seems to work

I think also the ALC/AGC of ffmeg is also much better than any other but does have latency.

ffmpeg -ac 1 -f alsa -i plughw:2 -filter:a loudnorm -f alsa plughw:2

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