Difficult material to gate, Creative use of the key input filters, Tips for using key inputs and key input filtering – Drawmer Drawmer Dynamics for Pro Tools User Manual
Page 21: Complicated keying, Leaving key listen enabled, Key filter propagation delay, Cleaner keying

Chapter 3: Drawmer Dynamics Parameters
17
By setting up a stereo plug-in with one channel 
in Gate mode and the other in Duck, the enve-
lope controls can be used to create interesting 
triggered panning effects, simply by feeding a 
mono signal into left and right channels and 
setting the Range control to maximum attenua-
tion.
Difficult Material To Gate
As with any Gate, noise can only be removed 
during pauses in the desired material. If noise 
contamination is serious enough to be evident 
even during moderately loud program material, 
simple gating will do little to help. In fact, the 
very fact that the Gate produces silence during 
pauses can make the noise content of the pro-
gram material even more apparent. In extreme 
cases, restricting the Range of the Gate to about 
–15 dB will adequately reduce noise during 
pauses but not sufficiently to cause an unaccept-
ably dramatic change in noise level as the Gate 
opens and closes.
Creative Use of the Key Input Filters
The key input filters in the Gate may also be 
used to good effect in situations where the de-
sired audio does not occupy the full audio spec-
trum. Conventional equalizers seldom have a 
sharp enough response to remove unwanted 
noise without also removing desired audio. 
Used with electric guitar, this produces little be-
low 100 Hz or above 3 kHz, so setting the Gate 
to Key Listen mode will enable you to use the fil-
ters to exclude much of the amplifier hum at the 
low end and hiss at the top end while having lit-
tle effect on the sound of the guitar. The same is 
true for acoustic guitar. The filters can be used to 
reduce fret noise or a player's breathing.
Other applications of the filters include remov-
ing unpleasant overtones from direct-injected 
instruments and warming up digital synthesizer 
sounds.
Tips For Using Key Inputs and Key 
Input Filtering
Complicated Keying
For a more intricate and musical key input, com-
bine several tracks together by bussing them to 
Auxiliary Inputs.
Leaving Key Listen Enabled
You can use the Gate as a simple filter by en-
abling Key Listen.
Key Filter Propagation Delay
Key input filtering with high frequency attenu-
ation can cause a slight delay in the time the 
Gate takes to trigger. Under most circumstances 
this will be imperceptible. However, when tran-
sient sounds are being processed with the HF 
Key Filter control set to a very low value, some 
degradation of the attack transient may become 
apparent.
Consequently, always set the HF Key Filter con-
trol to the highest possible value when process-
ing percussive sounds and set the Threshold as 
low as possible.
Cleaner Keying
It is often useful to use a Drawmer Dynamic 
plug-in to process the key input before it is used. 
Good results can be achieved by using an Ex-
pander (with the Compressor bypassed) on the 
key input source. This will give the key input 
source a more accentuated difference between 
