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OpCode
Value
<System
0x70
Audio
Mode
Request>
<System
0x7E
Audio
Mode
Status>
<User
0x44
Control
Pressed>
<User
0x45
Control
Released>
CEC Client Installation
Description
A device
implementing
System Audio
Control and which
has volume
control RC buttons
(eg TV or STB)
requests to use
System Audio
Mode to the
amplifier
Reports the
current status of
the System Audio
Mode
Used to indicate
that the user
pressed a remote
control button or
switched from one
remote control
button to another.
Used to control
audio rate from
Source Device.
Parameters
Response
[Physical
The amplifier comes
Address]
out of standby (if
necessary) and
switches to the
relevant connector
for device specified
by [Physical
Address]. It then
sends a <Set System
Audio Mode> [On]
Message. <System
Audio Mode
Request> sent
without a [Physical
Address] parameter
requests termination
of the feature. In this
case, the amplifier
sends a <Set System
Audio Mode> [Off]
message.
[System
If [On], the device
Audio
requesting this
Status]
information can
send the volume-
related <User
Control Pressed> or
<User Control
Released>
messages.
[UI
Increase or
Command]
Decrease the
of "Volume
volume of the
Up",
amplifier, or
"Volume
mute/unmute the
Down" or
amplifier.
"Mute"
[Audio
Perform the
Rate]
specified actions, or
return a <Feature
Abort> msg
Supported
Yes
Yes
Yes
Yes
48
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