Compressor - Boss BR-1180 Owner's Manual

How the Mastering Tool Kit Parameters Work
ExpM: Attack
This sets the time it takes for the midrange expander to go
into effect once the input level falls below the Middle
threshold level.
ExpM: Release
This sets the time it takes for the midrange expander effect to
stop once the input level exceeds the Middle threshold level.
ExpH: Thres
This sets the volume level at which the upper-range
expander goes into effect.
ExpH: Ratio
This sets the ratio of increase in output of the upper range
when the input level falls below the Hi threshold level.
ExpH: Attack
This sets the time it takes for the upper-range expander to go
into effect once the input level falls below the Hi threshold
level.
ExpH: Release
This sets the time it takes for the upper-range expander effect
to stop once the input level exceeds the Hi threshold level.
164
0–100 ms
50–5000 ms
-80–0 dB
1:1.00–1:16.0, 1:INF
0–100 ms
50–5000 ms

Compressor

This compresses the overall output signal when the input
volume level exceeds a set value.
Effect On/Off
This parameter turns the compressor effect on/off.
CompL: Thres
This sets the volume level at which the lower-range
compressor goes into effect.
CompL: Ratio
This sets the ratio of suppression of the lower-range output
when the input level exceeds the Lo threshold level.
CompL: Attack
This sets the time it takes for the lower-range compressor to
go into effect once the input level exceeds the Lo threshold
level.
CompL: Release
This sets the time it takes for the lower-range compressor
effect to stop once the input level falls below the Lo threshold
level.
CompM: Thres
This sets the volume level at which the midrange compressor
goes into effect.
CompM: Ratio
This sets the ratio of suppression of the midrange output
when the input level exceeds the Middle threshold level.
CompM: Attack
This sets the time it takes for the midrange compressor to go
into effect once the input level exceeds the Middle threshold
level.
CompM: Release
This sets the time it takes for the midrange compressor effect
to stop once the input level falls below the Middle threshold
level.
CompH: Thres
This sets the volume level at which the upper-range
compressor goes into effect.
CompH: Ratio
This sets the ratio of suppression of the upper-range output
when the input level exceeds the Hi threshold level.
OFF, ON
-24–0 dB
1:1.00–1:16.0, 1:INF
0–100 ms
50–5000 ms
-24–0 dB
1:1.00–1:16.0, 1:INF
0–100 ms
50–5000 ms
-24–0 dB
1:1.00–1:16.0, 1:INF