TC Electronic DB4 MKII - Manual (Page 13)

MDX 5.1
English Manual 9
Fig 3.
Example of dynamic range re-mapping: From
Home Theatre/DVD to Living Room listening
conditions (Fig 1).
Fig 3 and Fig 4 show rational transfer character-
istics complying with the DRT of the consumer,
without affecting levels when they are already
on target.
Fig 4.
Example of dynamic range re-mapping: From
Home Theatre/DVD to Living Room listening
conditions (Fig 1).
Basic Operation
On the Main page, MDX 5.1 offer Input Gain
controls for the Main Channels and for the LFE
Channel. This enables positive and negative gain
normalization to be performed in the 48 bit do-
main prior to low level processing and output
limiting. These gain controls therefore operate in
a safe location, well protected from generating
output overloads.
Tip: Use the Input Gains as overload protected
level trims in a critical realtime system, such as
broadcast, OB or live music.
On the Link pages, the 5 Main channels (L, C, R,
SL and SR) can be linked in numerous ways. The
concept is to assign a channel to a Sidechain. If
all channels are assigned to the same Sidechain,
processing is identical on all of them. If a channel
is assigned to a different Sidechain, processing
on that channel may be different from process-
ing on the other channels.
The DXP pages reveal separate controls for
Sidechain 1 to 3 plus LFE. This enables, for in-
stance, different settings for the Center or Sur-
round channels, where speech intelligibility or
low level ambience tend to get lost. Like when a
feature film is re-purposed for broadcast or DVD
under domestic listening conditions.
If it is required to process more audio channels
than 5.1, Engines can be run in parallel to cater
for 6.1, 7.1, 10.2, 12.2 or even higher number for-
mats. Parallel Engines attain perfect phase con-
servation and resolution, and do not compro-
mise audio in any way.
MDX 5.1 features 48 bit fixed point processing
throughout. Split and reconstruction filters are
phase linear when the algorithm is used in mul-
tiband modes.