Dan Dugan Sound Design E-2, Руководство пользователя

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Dugan Model E-2 User Guide
54
Gain Limiting
Gain Limiting reduces master gain as new mics enter the system, thus avoiding feed-
back and noise. Acoustic gain increases as each mic comes on, whether this occurs
manually, by placing that channel in
man
mode, or automatically using the Music
System. Gain Limiting is the only automatic mixing function that can be active
when the channel is in
man
mode. Gain Limiting is controlled by the
NOM
(Number-
of-Open-Mics) channel buttons and the master
NOM gain limit
field (see Figure 5-13).
NOTE: Since the Model E-2 has no master audio channel, Gain Limiting reduces the gain on all
input channels for which
NOM
is active.
Unlike typical NOM functions on other systems, Dugan Gain Limiting doesn’t just
count how many mics are on. It sums the instantaneous gains of all the channels
with
NOM
active (including partially attenuated channels), compares them to the
NOM
gain limit
threshold, and reduces the gain appropriately. Gain Limiting works inde-
pendently for each group.
Conventional automatic mixing implementations always assume an NOM of 1. This
can be effected on the Dugan by setting the
NOM gain limit
field to
1
, which maximizes
gain for each mic. Activate the
NOM
buttons for each channel you wish to be included
in the gain computation. The Master Gain Limiting display shows 3 dB of gain reduc-
tion when two mics are on, 6 dB of reduction with four mics on, etc.
Figure 5-14 NOM and gain reduction
Gain
Reduction
(dB)
8 6 4 2 0
Number of Open Mikes
(NOM)
4
2
0
6
8
10