output [channel] compressor

$ minidsp output 0 compressor --help
minidsp-output-compressor 

Control the compressor

USAGE:
    minidsp output <OUTPUT_INDEX> compressor [OPTIONS]

OPTIONS:
    -a, --attack <ATTACK>          Sets the attack time in ms
    -b, --bypass <BYPASS>          Bypasses the compressor (on | off)
    -h, --help                     Print help information
    -k, --ratio <RATIO>            Sets the ratio
    -r, --release <RELEASE>        Sets the release time in ms
    -t, --threshold <THRESHOLD>    Sets the threshold in dBFS