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Dugan Model E-3 User Guide

2. Reduce the maximum attenuation by setting the auto mix depth field to -10 dB.

This limits the range of downward expansion and mixes in a steady ambience.

If you use the Model CP-2 Control Panel, the last hold function is available: press

both the master override and preset buttons at once. Their LEDs blink to indicate

that last hold is on; toggle it off the same way. The last hold function keeps the last

mic on that stays above -3 dB gain for 0.5 seconds. When another mic passes the

same criteria, it becomes the last hold mic.

NOTE: The Music and Speech Systems operate independently, but the depth control is global to

both. Use different groups if necessary.

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 5-15).

NOTE: Since the Model E-3 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 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 independently

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.

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Dan Dugan Sound Design E Guide de l'utilisateur Page 50