Expert Sleepers Silent Way v1.7.3 - Manual (Page 15)

If both ‘Out 0->1’ and ‘Out -1->1’ are used, the output is simply the sum of the two set-
tings.
Multiplier
Scales the values set by the two ‘Out’ knobs. This can be useful if you’ve set up a pattern
you like automating the Out knobs and you just want to scale the overall output level.
Input Add
Sets the level of the input to the plug-in that is added in to the output signal.
Input Mult
Sets the amount by which the input signal is used to multiply the output signal. At a set-
ting of zero, the output is unaffected by the input. At a setting of one, the output is exactly
the normal output multiplied by the input signal.
Smooth
Applies one of two forms of smoothing to the output signal. This can be useful when the
very sudden changes in level that are possible in the digital domain cause clicks and pops
in your analogue gear.
Positive values apply slew rate limiting i.e. a limit is placed on how fast the output signal
can change. Signals changing slower than this rate are unaffected.
Negative values apply a simple low-pass filter to the signal. This has some affect on all
signals, whether they’re changing slowly or not.
In both cases, the values are given in milliseconds (ms). The time set is the time taken for a
full range voltage swing from -1.0 to +1.0.