Yamaha mLAN Mixer Owner's Manual page 31

HOLD
—This determines how long the gate stays open once the trigger signal has fallen below the
threshold level.
ATTACK
—This determines how fast the gate opens when the signal exceeds the threshold level. Slow
attack times can be used to remove the initial transient edge of percussive sounds. Too slow an attack
time makes some sounds appear backwards.
DECAY
—This determines how fast the gate closes once the hold time has expired. A longer decay time
produces a more natural gating effect, allowing the natural decay of an instrument to pass through.
With a maximum decay time of between 42 and 63 seconds, you could even use this for fade-outs.
DUCKING
Ducking is commonly used for voice-over applications in
which the background music level is reduced automatically
when an announcer speaks. Ducking is achieved by triggering a
compressor with a different sound source. For example, a
ducker is patched into the background music channel, and the
KEY IN signal is sourced from the announcer's microphone
channel. When the announcer's microphone level exceeds the
specified threshold, the background music level is reduced
automatically, allowing the announcer to be heard clearly. The
same technique can also be used for vocals in a mix. For exam-
ple, ducking backing sounds such as rhythm guitar and synth
pad during vocal phrases allows the vocals to be heard more
clearly. This can also be used to bring solo instruments up in a
mix.
Parameter
THRESHOLD
–54 dB to 0 dB (55 steps)
RANGE
–70 dB to 0 dB (71 steps)
0.02 ms–1.96 s (fs = 48 kHz)
HOLD
0.02 ms–2.13 s (fs = 44.1 kHz)
ATTACK
0–120 ms (1 ms steps)
5 ms–42.3 s (fs = 48 kHz)
DECAY
6 ms–46 s (fs = 44.1 kHz)
THRESHOLD
—This determines the level of trigger signal (KEY IN) required to activate ducking.
Trigger signal levels below the threshold do not activate ducking. Trigger signals at and above the
threshold level, however, activate ducking, and the signal level is reduced to a level set by the Range
parameter. The trigger signal is sourced using the KEY IN parameter.
RANGE
—This determines the level to which the signal is ducked. For a setting of –80 dB, the signal is
virtually cutoff. For a setting of –30 dB, however, the signal is ducked by 30 dB. For a setting of 0 dB, the
ducker has no effect.
HOLD
— This determines how long ducking remains active once the trigger signal has fallen below the
threshold level.
ATTACK
—This determines how soon the signal is ducked once the ducker has been triggered. With a
fast attack time, the signal is ducked almost immediately. With a slow attack time, however, ducking
appears to fade the signal. Too fast an attack time may sound abrupt.
DECAY
—This determines how soon the ducker returns to its normal gain once the trigger signal level
drops below the threshold.
+20
+10
0
–10
–20
–30
–40
–50
–60
–70
Range
31
Threshold = –20dB
Range = –30dB
–70 –60 –50 –40 –30 –20 –10 0
Input Level (dB)
+10 +20