User Guide
60
Overview of Dugan Automixing
In collaboration with Dan Dugan Sound Design, Inc., Sound Devices offers
another powerful automixing option as part of the 688’s Auto Mixer. The Dugan
Speech System™ uses Dugan’s own patented automixing algorithm that has
been an industry standard for many decades.
Dugan’s system operates on a very elegant principle: each individual input
channel is attenuated by an amount (in dB) equal to the difference (in dB)
between that channel’s level and the sum of all channel levels. The gain of
all channels is adjusted immediately and continuously based on what each
channel is receiving. The neat aspect of this mathematical construct is that the
total gain through the system never changes—always stays at 0dB. The core
concept of this mixer is totally automatic, so there are no thresholds or other
adjustments to set.
With Dugan automixing, multi-mic speech applications are mixed with smooth
automatic cross-fades for clear, optimized audio recordings.
LCD Views During Dugan Automixing
A circle icon is displayed next to the meter for each active automixed input. The
amount of purple
fi
lling the circles indicates the level of automix attenuation. If
the input is panned left or right, a purple half circles appears accordingly.
Full attenuation
No attenuation
Panned Right
Panned Left
The Meters view displays these circle icons above (vertical meters) or to the
right of (horizontal meters) the active mixed inputs. The Input Settings screen
will display the circle icon to the right of the meter.
