The Noisegate - Schippmann ebbe und flut User Manual

9.7 The Noisegate

The noisegate provides simply one knob [threshold] (38). With the switch (39) in center position, it
controls the VCA, depending on the input level at socket (24) and depending on the position of
knob (38).
It can be useful to 'clean' noisy input signals as well as to eliminate high output noise which may arise
out of settings, that provide high signal amplification. A higher output noise may be audible e.g. if the
[GAIN]-switch (22) is in position +20 db, the [compression] (3)- and the [distortion] (5)-knob on fully
clockwise position and the filter is open for the entire audio range. Another useful application is as
gate with fixed gate-time in order to cut reverb tails or long sustaining notes / sounds.
The detector, described in chapter 8.2 also detects the input level of the noisegate.
front: (38) [threshold]
The input level at which the noisegate responses, again is called threshold. With knob (38), it is lineary
adjustable in [db] between always open (fully counter clockwise position) to alway closed (fully clock-
wise position).
Fig. 9.7.1 shows the several durations (attack-, hold- und release-time) of the noisegate.
Threshold
Signal
-level
on-phase
attack-
hold- release-
Noisegate
time
time time
-output
35 ms
1 ms 200 ms
off
Fig. 9.7.1 Characteristics of the noisegate
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