Publications Command Strings SCM820 (English)
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    Command Strings for External Controller

    The SCM820 mixer can be connected via Ethernet to a control system, such as AMX®, Crestron® or Extron®.

    • Connection: Ethernet (TCP/IP; select “Client” in the AMX/Crestron program)
    • Port: 2202

    The SCM820 has 4 types of strings, as follows:

    1. GET – The GET command is used to find the status of a parameter. After the AMX/Crestron sends a GET command, the SCM820 responds with a REPORT string.
    2. SET – The SET command is used to change the status of a parameter. After the AMX/Crestron sends a SET command, the SCM820 will respond with a REPORT string to indicate the new value of the parameter.
    3. REP – When the SCM820 receives a GET or SET command, it will reply with a REPORT command to indicate the status of the parameter. REPORT is also sent by the MXW System when a parameter is changed via the front panel or via the GUI.
    4. SAMPLE – Used for metering audio levels.

    All messages sent and received are ASCII. Level indicators and gain indicators are also in ASCII. The SCM820 will send a REPORT command when any of these parameters change.

    Note: This document is the most popular commands. There are many more commands available. If you need to control/monitor other parameters, please contact us at support@shure.com and we will be able to assist you.

    A Crestron macro (written by Shure) can be downloaded here.

    Channels

    The character “x” in all of the following strings represents the channel of the mixer and can be ASCII numbers 0 through 19 as in the following table:

    ASCII Character SCM820 Channel
    0 All Channels
    1 through 8 Input Channels
    9 Aux Input
    10 through 17 Direct Outputs
    18 Output A
    19 Output B

    Device Commands

    View Device ID Command String:

    < GET DEVICE_ID >

    		 The Device ID command does not contain the x channel character, as it is for the entire device.
    SCM820 Response:

    < REP DEVICE_ID {yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy} >

    		 Where yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy is 31 characters of the device ID. The SCM820 always responds with a 31 character device ID.
    Set Device ID Command String:

    < SET DEVICE_ID {yyyyyyyy} >

    		 Where yyyyyyyy is 31 characters of the device ID. The device ID can be 1 to 31 characters long.
    SCM820 Response:

    < REP DEVICE_ID {yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy} >

    		 Where yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy is 31 characters of the device ID. The SCM820 always responds with a 31 character device ID.
    Flash Lights on SCM820 Command String:

    < SET FLASH ON >

    < SET FLASH OFF >

    		 Send one of these commands to the SCM820. The flash automatically turns off after 60 seconds.
    SCM820 Response:

    < REP FLASH ON >

    < REP FLASH OFF >

    		 The SCM820 will respond with one of these strings.
    Set Auto Link Mode Command String:

    < SET AUTO_LINK_MODE ON >

    < SET AUTO_LINK_MODE OFF >

    This set of commands forces a channel to be ON. If this is OFF, the channel would typically be in Automix mode.

    Mix A and Mix B have different commands. Send one of these commands, depending on the mix.
    SCM820 Response:

    < REP AUTO_LINK_MODE ON >

    < REP AUTO_LINK_MODE OFF >

    		 The SCM820 will respond with one of these strings.
    Get Auto Link Mode Command String:

    < GET AUTO_LINK_MODE >
    SCM820 Response:

    < REP AUTO_LINK_MODE ON >

    < REP AUTO_LINK_MODE OFF >

    		 The SCM820 will respond with one of these strings.

    Audio Commands

    Get Audio Gain Command String:

    < GET x AUDIO_GAIN_HI_RES >

    		 Where x is ASCII channel number: 0, 1-9, and 18-19 (see Channels table).
    SCM820 Response:

    < REP x AUDIO_GAIN_HI_RES yyyy >

    		 Where yyyy takes on the ASCII values of 0000 to 1280. yyyy is in steps of one-tenth of a dB.
    Set Audio Gain Command String:

    < SET x AUDIO_GAIN_HI_RES yyyy >

    		 Where yyyy takes on the ASCII values of 0000 to 1280. yyyy is in steps of one-tenth of a dB.
    SCM820 Response:

    < REP x AUDIO_GAIN_HI_RES yyyy >

    		Where yyyy takes on the ASCII values of 0000 to 1280.
    Increase Audio Gain by n dB Command String:

    < SET x AUDIO_GAIN_HI_RES INC nn >

    		 Where nn is the amount in one-tenth of a dB to increase the gain. nn can be single digit (n), double digit (nn), triple digit (nnn).
    SCM820 Response:

    < REP x AUDIO_GAIN_HI_RES yyyy >

    		 Where yyyy takes on the ASCII values of 0000 to 1280.
    Decrease Audio Gain by n dB Command String:

    < SET x AUDIO_GAIN_HI_RES DEC nn >

    		 Where nn is the amount in one-tenth of a dB to decrease the gain. nn can be single digit (n), double digit (nn), triple digit (nnn).
    SCM820 Response:

    < REP x AUDIO_GAIN_HI_RES yyyy >

    		 Where yyyy takes on the ASCII values of 0000 to 1280.
    Get Audio Mute Command String:

    < GET x AUDIO_MUTE >

    		 Where x is ASCII channel number: 0, 1-9, and 18-19 (see Channels table).
    SCM820 Response:

    < REP x AUDIO_MUTE ON >

    < REP x AUDIO_MUTE OFF >

    		 The SCM820 will respond with one of these strings.
    Mute Audio Command String:

    < SET x AUDIO_MUTE ON >
    SCM820 Response:

    < REP x AUDIO_MUTE ON >
    Unmute Audio Command String:

    < SET x AUDIO_MUTE OFF >
    SCM820 Response:

    < REP x AUDIO_MUTE OFF >
    Toggle Audio Mute Command String:

    < SET x AUDIO_MUTE TOGGLE >
    SCM820 Response:

    < REP x AUDIO_MUTE ON >

    < REP x AUDIO_MUTE OFF >

    		 The SCM820 will respond with one of these strings.
    Input Audio Mix Bus Command String:

    < SET x INPUT_AUDIO_MIX_BUS sts >

    < GET x INPUT_AUDIO_MIX_BUS >

    Where x is the channel and takes on value 0 and 1 - 8 for input channels and 9 for aux input

    Where sts represents the desired setting and takes on values:

    • MIXBUS_A
    • MIXBUS_B
    • BOTH
    • NEITHER
    SCM820 Response:

    < REP x INPUT_AUDIO_MIX_BUS sts >

    < REP ERR >

    		 The SCM820 will respond with one of these strings.

    Channel Commands

    View Channel Name Command String:

    < GET x CHAN_NAME >

    		 Where x is ASCII channel number: 0 through 19.
    SCM820 Response:

    < REP x CHAN_NAME {yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy} >

    		 Where yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy is 31 characters of the user name. The SCM820 always responds with a 31 character name.
    Set Channel Name Command String:

    < SET x CHAN_NAME {yyyyyyyy} >

    		 Where yyyyyyyy is 31 characters of the channel name. The channel name can be 1 to 31 characters long. Each channel must have a unique name.
    SCM820 Response:

    < REP x CHAN_NAME {yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy} >

    		 Where yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy is 31 characters of the channel name. The SCM820 always responds with a 31 character name.
    Get Channel Forced On Command String:

    < GET x ALWAYS_ON_ENABLE_A >

    < GET x ALWAYS_ON_ENABLE_B >

    This set of commands forces a channel to be ON. If this is OFF, the channel would typically be in Automix mode.

    Mix A and Mix B have different commands. Send one of these commands, depending on the mix.
    SCM820 Response:

    < REP x ALWAYS_ON_ENABLE_A OFF >

    < REP x ALWAYS_ON_ENABLE_B OFF >

    < REP x ALWAYS_ON_ENABLE_A ON >

    < REP x ALWAYS_ON_ENABLE_B ON >

    		 The SCM820 will respond with one of these strings.
    Set Channel Forced On Command String:

    < SET x ALWAYS_ON_ENABLE_A OFF >

    < SET x ALWAYS_ON_ENABLE_A ON >

    < SET x ALWAYS_ON_ENABLE_A TOGGLE >

    < SET x ALWAYS_ON_ENABLE_B OFF >

    < SET x ALWAYS_ON_ENABLE_B ON >

    < SET x ALWAYS_ON_ENABLE_B TOGGLE >

    This set of commands forces a channel to be ON. If this is OFF, the channel would typically be in Automix mode.

    Mix A and Mix B have different commands. Send one of these commands, depending on the mix.
    SCM820 Response:

    < REP x ALWAYS_ON_ENABLE_A OFF >

    < REP x ALWAYS_ON_ENABLE_B OFF >

    < REP x ALWAYS_ON_ENABLE_A ON >

    < REP x ALWAYS_ON_ENABLE_B ON >

    		 The SCM820 will respond with one of these strings.
    Input Audio Source Command String:

    < GET x INPUT_AUDIO_SOURCE >

    < SET y INPUT_AUDIO_SOURCE source >

    Where x is channel number 0 through 9

    Where y is channel number 1 through 9

    Where source indicates the desired source:

    • Analog
    • Network
    SCM820 Response:

    < REP y INPUT_AUDIO_SOURCE source >

    <REP ERR >

    		 Returns an error for channels 10 to 19

    Digital Signal Processing Commands

    Set IntelliMix® Mode Command String:

    < SET x INTELLIMIX_MODE CLASSIC >

    < SET x INTELLIMIX_MODE SMOOTH >

    < SET x INTELLIMIX_MODE EXTREME >

    < SET x INTELLIMIX_MODE CUSTOM >

    < SET x INTELLIMIX_MODE MANUAL >

    < SET x INTELLIMIX_MODE CUSTOM_PRESET >

    Where x is ASCII channel number: 18-19.

    Send only one of these commands.

    SCM820 Response:

    < REP x INTELLIMIX_MODE CLASSIC >

    < REP x INTELLIMIX_MODE SMOOTH >

    < REP x INTELLIMIX_MODE EXTREME >

    < REP x INTELLIMIX_MODE CUSTOM >

    < REP x INTELLIMIX_MODE MANUAL >

    < REP x INTELLIMIX_MODE CUSTOM_PRESET >

    		 The SCM820 will respond with one of these strings.
    Get IntelliMix Mode Command String:

    < GET x INTELLIMIX_MODE >

    		 Where x is ASCII channel number: 18-19
    SCM820 Response:

    < REP x INTELLIMIX_MODE CLASSIC >

    < REP x INTELLIMIX_MODE SMOOTH >

    < REP x INTELLIMIX_MODE EXTREME >

    < REP x INTELLIMIX_MODE CUSTOM >

    < REP x INTELLIMIX_MODE MANUAL >

    < REP x INTELLIMIX_MODE CUSTOM_PRESET >

    		 The SCM820 will respond with one of these strings.
    Set Assign DFR 1 Command String:

    < SET DFR1_ASSIGNED_CHAN x >

    		 Where x is ASCII channel number: 1-8, 18-19 (see Channels table). x is 20 for Unassigned.
    SCM820 Response:

    < REP DFR1_ASSIGNED_CHAN xxx >

    		Where x is ASCII channel number: 001-008, 018-019 (see Channels table). x is 020 for Unassigned.
    Set Assign DFR 2 Command String:

    < SET DFR2_ASSIGNED_CHAN x >

    		 Where x is ASCII channel number: 1-8, 18-19 (see Channels table). x is 20 for Unassigned.
    SCM820 Response:

    < REP DFR2_ASSIGNED_CHAN xxx >

    		 Where x is ASCII channel number: 001-008, 018-019 (see Channels table). x is 020 for Unassigned.
    Get Assign DFR 1 Command String:

    < GET DFR1_ASSIGNED_CHAN >
    SCM820 Response:

    < REP DFR1_ASSIGNED_CHAN xxx >

    		 Where x is ASCII channel number: 001-008, 018-019 (see Channels table). x is 020 for Unassigned.
    Get Assign DFR 2 Command String:

    < GET DFR2_ASSIGNED_CHAN >

    SCM820 Response:

    < REP DFR2_ASSIGNED_CHAN xxx >

    		 Where x is ASCII channel number: 001-008, 018-019 (see Channels table). x is 020 for Unassigned.
    Set DFR 1 Bypass Command String:

    < SET DFR1_BYPASS ON >

    < SET DFR1_BYPASS OFF >

    		 Send one of these commands to the SCM820.
    SCM820 Response:

    < REP DFR1_BYPASS ON >

    < REP DFR1_BYPASS OFF >

    		 The SCM820 will respond with one of these strings.
    Set DFR 2 Bypass Command String:

    < SET DFR2_BYPASS ON >

    < SET DFR2_BYPASS OFF >

    		 Send one of these commands to the SCM820.
    SCM820 Response:

    < REP DFR2_BYPASS ON >

    < REP DFR2_BYPASS OFF >

    		 The SCM820 will respond with one of these strings.
    Get DFR 1 Bypass Command String:

    < GET DFR1_BYPASS >
    SCM820 Response:

    < REP DFR1_BYPASS ON >

    < REP DFR1_BYPASS OFF >

    		 The SCM820 will respond with one of these strings.
    Get DFR 2 Bypass Command String:

    < GET DFR2_BYPASS >
    SCM820 Response:

    < REP DFR2_BYPASS ON >

    < REP DFR2_BYPASS OFF >

    		 The SCM820 will respond with one of these strings.
    Clear DFR 1 Filters Command String:

    < SET DFR1_CLEAR_ALL_FILTERS ON >

    		 There is no need to send an OFF command
    SCM820 Response:

    < REP DFR1_CLEAR_ALL_FILTERS ON >
    Clear DFR 2 Filters Command String:

    < SET DFR2_CLEAR_ALL_FILTERS ON >

    		 There is no need to send an OFF command
    SCM820 Response:

    < REP DFR2_CLEAR_ALL_FILTERS ON >
    Set DFR 1 Freeze Command String:

    < SET DFR1_FREEZE ON >

    < SET DFR1_FREEZE OFF >

    		 Send one of these commands to the SCM820.
    SCM820 Response:

    < REP DFR1_FREEZE ON >

    < REP DFR1 FREEZE OFF >

    		 The SCM820 will respond with one of these strings.
    Set DFR 2 Freeze Command String:

    < SET DFR2_FREEZE ON >

    < SET DFR2_FREEZE OFF >

    		 Send one of these commands to the SCM820.
    SCM820 Response:

    < REP DFR2_FREEZE ON >

    < REP DFR2 FREEZE OFF >

    		 The SCM820 will respond with one of these strings.
    Get DFR 1 Freeze Command String:

    < GET DFR1_FREEZE >

    SCM820 Response:

    < REP DFR1_FREEZE ON >

    < REP DFR1_FREEZE OFF >

    		 The SCM820 will respond with one of these strings.
    Get DFR 2 Freeze Command String:

    < GET DFR2_FREEZE >

    SCM820 Response:

    < REP DFR2_FREEZE ON >

    < REP DFR2_FREEZE OFF >

    		 The SCM820 will respond with one of these strings.

    Monitoring Commands

    Get Gate Status, Mix A Command String:

    < GET x INPUT_AUDIO_GATE_A >

    Where x is ASCII channel number: 0 through 8 (see Channels table).

    It is not necessary to continually send this command. The SCM820 will send a REPORT message whenever the status changes.
    SCM820 Response:

    < REP x INPUT_AUDIO_GATE_A ON >

    < REP x INPUT_AUDIO_GATE_A OFF >

    		 The SCM820 will respond with one of these strings.
    Get Gate Status, Mix B Command String:

    < GET x INPUT_AUDIO_GATE_B >

    Where x is ASCII channel number: 0 through 8 (see Channels table).

    It is not necessary to continually send this command. The SCM820 will send a REPORT message whenever the status changes.
    SCM820 Response:

    < REP x INPUT_AUDIO_GATE_B ON >

    < REP x INPUT_AUDIO_GATE_B OFF >

    		 The SCM820 will respond with one of these strings.
    Get Limiter Engaged Status Command String:

    < GET x LIMITER_ENGAGED >

    Where x is ASCII channel number: 0 and 18-19 (see Channels table).

    It is not necessary to continually send this command. The SCM820 will send a REPORT message whenever the status changes.
    SCM820 Response:

    < REP x LIMITER_ENGAGED ON >

    < REP x LIMITER_ENGAGED OFF >

    		 The SCM820 will respond with one of these strings.
    Get Input Clip Status Command String:

    < GET x AUDIO_IN_CLIP_INDICATOR >

    Where x is ASCII channel number: 0 through 9 (see Channels table).

    It is not necessary to continually send this command. The SCM820 will send a REPORT message whenever the status changes.
    SCM820 Response:

    < REP x AUDIO_IN_CLIP_INDICATOR ON >

    < REP x AUDIO_IN_CLIP_INDICATOR OFF >

    		 The SCM820 will respond with one of these strings.
    Get Output Clip Status Command String:

    < GET x AUDIO_OUT_CLIP_INDICATOR >

    Where x is ASCII channel number: 10 through 19 (see Channels table).

    It is not necessary to continually send this command. The SCM820 will send a REPORT message whenever the status changes.
    SCM820 Response:

    < REP x AUDIO_OUT_CLIP_INDICATOR ON >

    < REP x AUDIO_OUT_CLIP_INDICATOR OFF >

    		 The SCM820 will respond with one of these strings.
    Turn Metering On Command String:

    < SET METER_RATE sssss >

    Where sssss is the metering speed in milliseconds.

    Setting sssss=0 turns metering off. Minimum setting is 100 milliseconds. Metering is off by default.

    SCM820 Response:

    < REP METER_RATE sssss >

    < SAMPLE aaa bbb ccc ddd eee fff ggg hhh iii jjj kkk lll mmm nnn ooo ppp qqq rrr sss >

    Where aaa, bbb, etc is the value of the audio level received and is 000-120.

    aaa = input 1

    bbb = input 2

    ccc = input 3

    ddd = input 4

    eee = input 5

    fff = input 6

    ggg = input 7

    hhh = input 8

    iii = aux input

    jjj = direct out 1

    kkk = direct out 2

    lll = direct out 3

    mmm = direct out 4

    nnn = direct out 5

    ooo = direct out 6

    ppp = direct out 7

    qqq = direct out 8

    rrr = mix out A

    sss = mix out B

    Stop Metering Command String:

    < SET METER_RATE 0 >

    A value of 00000 is also acceptable.
    SCM820 Response:

    < REP METER_RATE 00000 >

    Error Codes

    There is a < REP ERR > error string that indicates the command is not able to be implemented. This is usually due to a typo or a command that does not exist.