TC Electronic Broadcast 6000 - Manual (Page 127)

Massenburg (MDW) EQ
English Manual 123
Massenburg (MDW) EQ
The MDW Hi Res EQ 2 channel algorithm oc-
cupies:
– @ Normal Sample Rate: 1/4 DSP Resource
– @ Double Sample Rate: 1/4 DSP Resource
The inputs and outputs of this algorithm are dis-
tributed as follows:
Input Output
L
E1
E2
E3
E4
L
R R
The MDW Hi Res EQ 6 channel algorithm oc-
cupies:
– @ Normal Sample Rate: 3/4 DSP Resource
– @ Double Sample Rate: 3/4 DSP Resource
The inputs and outputs of this algorithm are dis-
tributed as follows:
Input Output
1
E1
E2
E3
E4
1
2 2
3 3
4 4
5 5
6 6
Introduction
More than one flavor of EQ
In recognition of George Massenburg’s great
sense of audio and strong influence on previ-
ous TC processors, the new MDW HiRes EQ
is offered as an licensed algorithm option. The
MDW design complements the TC alternatives
and therefore offers the user a choice between
several desirable EQ flavors, each with specific
advantages. All of them have processing capa-
bilities worthy of handling any critical signal path.
System 6000 and MDW HiRes EQ
The combination System 6000/MDW HiRes EQ
constitutes a 48 bit precision signal path from
Input to Output. It comes in 2 and 6 channel
configurations with flexible linking and absolute/
relative realtime adjustment properties. The 6
channel version features 6 identical processing
channels making it equally suitable for control-
ling 5.1 and 6.0 signals.
Quality equalization is not only a question of a
fine filter design with high bit resolution. Preci-
sion in timing is just as important, as is con-
version from Analog to Digital and vice versa.
The high resolution routing, extremely low jitter
and pristine conversion environment provided
by System 6000 bring out the best qualities in
George’s digital EQ design.
Sample Rate
If the System rate is set at 44.1 or 48 kHz, the sig-
nal is up-sampled to double rate, processed and
down-sampled to System rate. This approach is
one way of mimicking more precisely the behav-
ior of analog EQs plus reducing alias distortion.
The EQ can also be operated at 88.2 or 96 kHz.
At high System rates, up/down sampling is by-
passed, providing a bit transparent signal path
at unity gain.
Bands and Filters
The EQs feature 5 parametric bands per chan-
nel. Outer bands can be configured as shelving
or 2nd order filters (Butterworth). Band 1 filters
can be switched between 2nd and 4th order.
All five bands cover the complete frequency
range. Each parametric or shelving band is ca-
pable of cut/boost over a ±25 dB range.
Channel Linking and
operational Hints
In the 2 channel version, equalization of stereo
material should initially be performed in Abso-
lute link mode, i.e. changes applied to Left chan-
nel will also be applied to Right. If it is indicated
to make different adjustments to L and R, the
link is released until the desired differences have