Dan Dugan Sound Design D-3 - Manual (Page 28)

Dugan Model D-3 User Guide Operation
28
3.3.1 How the Speech System Works
Figure 3-3
The Dugan Speech System automatically manages any number of live mics in an un-
predictable dialogue situation. Figure 3-3 shows the Speech System in action, with four
snapshots of a three-mic system under simulated conditions.
• The first frame shows no one speaking; the sound levels at all mics are low. The
system fades all channels to a medium gain that sums to the equivalent of one mic
at full gain.
• The second frame shows one person speaking. The system automatically fades his/
her gain to full, while the other two inputs are turned down.
• The third frame shows a different person speaking. The system automatically fades
his/her gain to full, while the other two inputs are turned down.
• The fourth frame shows two people speaking simultaneously. The system automat-
ically shares the gain between them, while the other input is turned down.
3.3.2 Auto Mix Weight
The
auto mix weight
controls set the relative sensitivity of the automatic mix for
channels in use. When the
auto mix weight
controls are balanced, each mic has an
equal opportunity to take over the system: when one person talks into one mic, he/she
gets all the gain and the others get turned down.
It is important to understand that the Speech System works by detecting the ratios of the
levels between channels, not their absolute levels. The
auto mix weight
control is not
a gate threshold!
Sound levels
at mics (dB)
Frame 1 Frame 2 Frame 3 Frame 4
40
50
60
70
Resulting
automix
gains (dB)
-30
-20
-10
0