TC Electronic DB4 MKII - Manual (Page 22)

Multiband 5.1
18 DB4 / DB8 MKII Algorithms
Performance Settings
Crest
Range:
Peak, 6 dB, 10 dB, 12 dB, 14 dB, 16 dB, 20 dB,
24 dB, RMS
Select compression method between RMS and
PEAK.
The dB steps between RMS and Peak are the
dBs needed for a peak-value to override RMS
measurement.
Nominal Delay
Range: 0 to 15 ms
(<2 ms in 0.1 ms steps. >2 ms in 0.5 ms steps)
Sets the nominal Delay of the signal compared
to the
Sidechain signal. This is also known as “Look
ahead Delay”, enabling the Compressor sec-
tion to become more responsive to the incom-
ing signal.
Automatic Make Up Gain
Range: Off/On
Switches the Automatic Make-up gain On or Off.
As using compression is a reduction of dynamic
range in the signal a compensation for this loss
of gain on the Output side is possible. Use the
Auto Make Up gain to achieve this.
Reference Level
Range: -24 dBFS to 0 dBFS in 0.5 dB steps
This parameter sets the reference level in the al-
gorithm. The reference level is the level at which
the Threshold parameters will start operating
when set to 0 dB. E.g. if the Reference Level is
set to -18 dBFS (often referred to as 0 dBu), a
Threshold setting at -4 dB, will cause the Com-
pressor to start operating at -22 dBFS.
Multiband 5.1 algorithm –
side chain control page
Multiband 5.1 algorithm – side chain control
page
The sidechain assignment possibilities in the
Multiband 5.1 are very comprehensive. Carefully
selecting which channels should be controlled
by which Sidechains, is just as essential as di-
aling in the correct Threshold and Ratio values.
It is possible to freely select any or none of three
Sidechains to control each of the main-channels.
This also gives you the option of grouping the
channels. In addition to this, the LFE channel
has its own Sidechain control. This enables e.g.
setting up two Multiband 5.1 algorithms in se-
rial setup, while having six individual Sidechains
available, enabling fully individual Sidechain con-
trols of all channels.
At the Feed page it is possible to make additional
Sidechain link Inputs, for e.g. having the Center-
channel contributing to the Sidechain Inputs of
the two Front channels, to create a more coher-
ent sound from the front-channels.
The illustration above reflects the Processing
parameter set to Multiband 5.1 in Normal mode.
Basic operation
At the Setup/Control page it is possible to decide
which Sidechains should control which chan-
nels. Select any of three Sidechains to be as-
signed to any of the five Main-channels. You can
also chose to pass the channels unprocessed
through the algorithm. The LFE channel can be
assigned to its own separate Sidechain, or left
unprocessed.