FrontRow CM900 Installer's Manual page 23

Command
#ACH?
The device should return a value between 0 and maxInput (incl). A value of 0 indicates the device is in mixed
channels mode, where all input channels are mixed together for output. The return string should be terminated by a
carriage-return (hex value 0d).
Command
#ACHn
n
Not all devices support setting the input channel, and for those that do, the maxInput value will vary (often it is 3 or
4). In addition, not all devices will support the mixed channels setting (value 0).
Command
#ACR
This command decreases the channel by one to the next available channel. If the current setting is the minimum one,
it will cycle to the maximum available setting.
Command
#ACF
This command increases the channel by one to the next available channel. If the current setting is the maximum one,
it will cycle to the minimum available setting.
Description
channel query
Description
set volume
a decimal value between 0 and maxInput (incl), which sets the
current active input channel (the one passed to the output).
Description
reverse one channel setting
Description
forward one channel setting
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