UPDATE
GAINS
-
PHASE
:
CMD
=01
H
A
.
The
User
has
to
send
the
following
Command
,
including
the
value
to
be
assigned
to
“
Vol
”,
for
modifying
the
Input
Gain
(
Chn
= 0, 1)
or
the
Output
Volume
(
Chn
= 2, 3, 4,
5, 6, 7
).
Also
the
Output
signal
Phase
can
be
modified
:
TX
:
STX
ID
_
M
ID
_
N
CMD
D0
D1
D2
D3
D4
D5
D6
D7
ETX
F0H
C3H
XX
01H
Chn
00H
00H
00H
00H
00H
Phs
Vol
F7H
XX
= 0,..,3
1 (
ID
device
)
Chn
=0,...,7:
Channel
selected
,
0, 1=
In
1,
In
2; 2,...
,7=
Out
1
,..,
Out
6;
when
Channel
0, 1
selected
,
then
Vol
=
Input
Gain
,
when
Channel
2, 3,
4
,
5, 6, 7
selected
,
then
Vol
=
Output
Vol
.
Phs
=
Phase
only
if
the
Chn
>
1
;
Value
=
0
,
1
where
0=
direct
,
1
=
inverse
(
180'
)
Vol
=
Gains
from
0
to
18
0 (
-
12
dB
/ +
6
dB
step
0.1
dB
)
B
.
If
the
command
has
been
properly
executed
and
the
Gain
/
Volume
modified
,
then
the
microcontroller
will
send
back
to
the
User
(
eg
Crestron
/
AMX
Remote
Control
..)
the
same
frame
used by
the
command
:
RX
:
STX
ID
_
M
ID
_
N
CMD
D0
D1
D2
D3
D4
D5
D6
D7
ETX
F0H
C3H
XX
01H
Chn
00H
00H
00H
00H
00H
Phs
Vol
F7H
2 In - 4 Out Speaker Management System
Input
Gain
and
Output
Volume
Control
