Knoll GRS44 Supported Commands, Function Command Range Read/Write Remarks

8

Supported Commands

Command Summary
# = numerical zone or amplifier channel value
$$ = second numerical value (may be one or two digits)
Function	Command	Range	Read/Write		Remarks
Version	(vr?)	none	read only
Reset	(rx)	none	write only		1 second
Channel On	(#on)	1-4	write only
Channel Off	(#of)	1-4	write only
Mute	(#mu)	1-4	write only
Un-mute	(#um)	1-4	write only		Note 3
Mute All	(amu)	none	write only		Note 3
Un-mute All	(aum)	none	write only
Volume Request	(#vl?)	1-4	read only
Volume Set	(#vl$$)	1-4 / 0-87	write only
Volume All	(avl$$)	0-87	write only
Input Request	(#sl?)	1-4	read only
Input Set	(#sl$)	1-4 / 1-4	write only
Input Select All	(asl$)	1-4	write only
All Channels On	(aon)	none	write only
All Channels Off	(aof)	none	write only		Note 3
All Channels Vol up	(avlu)	none	write only		Note 1
All Channels Vol dn	(avld)	none	write only		Note 1
Channel Vol up	(#vlu)	1-4	write only		Note 1
Channel Vol down	(#vld)	1-4	write only		Note 1
Bass adjustment	(#b$)	1-4 / 0-F	write only		Note 2
Treble adjustment	(#t$)	1-4 / 0-F	write only		Note 2
Display treble	(#b?)	1-4	read	only
Display bass	(#t?)	1-4	read	only

Note1: Volume up or down requests increase or decrease volume level by 5

Note 2: Treble and bass commands use hexadecimal values 0-F, default (flat) is 8.

Note3: After “ALL Channels Off” command an “Un-mute” must be sent to each channel to restore a channel volume.

Also, it is best to leave about a ½ second between commands, as some integrators may miss commands if they are entered too quickly.

All commands also send a message back to the terminal after they have been completed, so that it is easy to keep track of the previous commands that were sent.

Note: Some commands are read or write only and some are both – for example: Mute All is a write only command and Version is a read only command.

Supported Command Messages

Function	Command	Message
Version	(vr?)	Version Number
Reset	(rx)	“Resetting...”
Channel On	(#on)	“Zone # on”
Channel Off	(#of)	“Zone # off“
Mute	(#mu)	“Zone # muted”
Un-mute	(#um)	“Zone # unmuted”
Mute All	(amu)	"All channels muted"