Using the Application Tabs to Configure a CP750
Dolby
®
CP750 Digital Cinema Processor Manual
27
Fader Preset
To
use
the
Fader
Preset
feature,
choose
Enable
and
indicate
a
value
on
the
slider.
This
ensures
that
inputs
play
at
correct
values
each
time
they
are
selected.
PCM Channel Assignment
The
analog
audio
output
channels
(L,
R,
C,
LFE,
Ls,
Rs)
are
always
fixed
and
hardwired
to
a
cinema
processor.
However,
when
the
input
‐
channel
mapping
of
a
PCM
bitstream
is
not
a
default
SMPTE
configuration
(L/R,
C/LFE,
Ls/Rs),
you
must
reassign
the
input
channels
to
match
the
hardwired
audio
outputs.
For
channel
reassignment,
the
surround
delay
and
the
LFE
filter
are
always
tied
at
the
output,
and
therefore
cause
no
problem.
To
reassign
the
input
channels,
use
the
drop
‐
down
Assigned
To
menu
for
each
of
the
AES
Input
channels
or
click
one
of
the
three
preset
buttons
(
L/R
C/Sw
Ls/Rs
;
L/C
R/Ls
Rs/Sw
;
or
L/Ls
C/Rs
R/Sw
).
To
activate
your
changes,
click
the
Apply
changes
button.
To
cancel
your
changes,
click
the
Discard
changes
button.
PCM Decode Mode
You
can
select
one
of
four
surround
channel
processing
options:
•
None
•
Pro
Logic
•
Pro
Logic
II
•
Surround
EX
•
Dolby
Surround
7.1
PCM Processing Mode
You
have
three
choices
of
mode:
•
Minimum
Latency
:
When
selected,
this
default
mode
provides
the
quickest
audio
processing
(approximately
7
ms)
for
PCM
audio.
•
Silent
Switch
:
When
selected,
the
CP750
constantly
checks
for
transitions
between
PCM
and
coded
audio,
and
switches
between
the
two
silently.
This
mode
adds
a
40
ms
latency
to
the
audio
processing
(for
a
total
latency
of
approximately
47
ms).
•
Mute
:
When
selected,
PCM
audio
is
muted.
Dolby
Digital
plays
normally.
Dolby Digital Decode Mode
You
choose
how
the
system
decodes
a
two
‐
channel
input
stream.
There
are
four
options:
•
Auto
•
Pro
Logic
•
Pro
Logic
II
•
Surround
EX
Note:
Both
Minimum
Latenc
y
and
Silent
Switch
automatically
switch
between
PCM
and
coded
audio.
Minimum
Latency
may
produce
an
audible
snat
during
the
transition.
Summary of Contents for CP750
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