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Audio
Menu
The
following
diagram
illustrates
the
structure
and
flow
of
the
Audio
Menu
on
the
Adtec
EN-31
device:
Control
Function
Options
API
Command
<<
1
-
2
>>
Parallel
Menus.
Surround
Sound
Determines
the
surround
sound
mode
OFF,
DD,
DD-06,
AAC-LC,AAC-HE
v1
*.ECMD#
SMO
0
<<
1
-4
>>
Parallel
Menus.
Input
Determines
type
of
audio
input
being
received
Note:
AES
and
Analog
input
are
only
available
for
Audio1
and
Audio2
SDI
Analog
AES
*.ECMD#
AIN
(0-3)
Mode
The
Audio
Mode
can
be
set
to
ENCODE
(compress
the
audio)
or
PASSTHRU
(accept
compressed
Dolby
or
PCM
type
bitstream
on
SDI
or
AES.
It
will
be
time-aligned
and
multiplexed
into
the
transport
stream.)
OFF
Encode
Passthru
*.ECMD#
AMO
(0-3)
SEE
AMO
in
API
documentation
Type
If
the
mode
is
ENCODE,
the
type
can
be
set
to
MPEG,
AC3,
and
AAC
codec.
If
the
mode
is
set
to
PASSTHRU,
there
is
support
for
Dolby
E,
Dolby
Digital
AC3
and
5.1,
PCM
(302M),
and
Linear
Acoustic
E2.
Dolby
Digital
is
part
of
the
ATSC
A53
spec.
with
a
stream
type
of
0x81
and
required
for
ATSC
applications.
DD
0x81
MU
0x03
DE
LP
DD
0x06
MU
0x04
AAC-LC
AAC-HEv1
AAC-HEv2
*.
ECMD#
AMO
(0-3)
SEE
AMO
in
API
documentation
Rate
Mpeg1Layer2
32-384
kbit/s
AC3
Encode
56
-
640
kbit/s
AAC
-
48
-
320
kbit/s
PASSTHRU
-
Auto-Detects
32
-
640
kbit/s
*.ECMD#
AMO
(0-3)
SEE
AMO
in
API
documentation
Level
Audio
Level
can
be
set
in
-18
-
+8
dB
*.ECMD#
ALV
(0-3)
23