QRC Commands

QRC is a Unicode-based TCP/IP control protocol. The client connects to the Q-SYS Core (or emulator) on port 1710 and sends JSON RPC 2.0 null-terminated commands.

Note: For the JSON-RPC 2.0 Specification, visit jsonrpc.org.

Use these methods to log on to the Q-SYS Core via the QRC protocol and maintain the socket connection.

Logs on to the system.

Parameters

User, Password

Example

{
  "jsonrpc":"2.0",
  "method":"Logon",
  "params":{
    "User":"username",
    "Password":"1234"
  }
}

This is a simple, "do nothing" method for making sure that the socket remains open.

Parameters

None.

Example

{
  "jsonrpc":"2.0",
  "method":"NoOp",
  "params":{
  }
}

Use these methods to obtain the status of the Q-SYS Core.

This method is automatically deployed to return the status of the Q-SYS Core whenever a client connects to the QRC port or the status changes.

Parameters

State : One of the following strings – "Idle", "Active", "Standby".

DesignName : Name of the currently running design.

DesignCode : GUID of the currently running design.

IsRedundant : True if the design is configured to be a redundant design.

IsEmulator : True if the design is currently running in the emulator.

Example

{
  "jsonrpc":"2.0", 
  "method":"EngineStatus", 
  "params":{
    "State":"Active", 
    "DesignName":"MyDesign", 
    "DesignCode":"qALFilm6IcCo", 
    "IsRedundant":false, 
    "IsEmulator":true
  }
}

Manually request the current status. Returns the EngineStatus of the Q-SYS Core.

Parameters

NA

Response Results

Platform : The Q-SYS Core model.

State : One of the following strings – "Idle", "Active", "Standby".

DesignName : Name of the currently running design.

DesignCode : GUID of the currently running design.

IsRedundant : True if the design is configured to be a redundant design.

IsEmulator : True if the design is currently running in the emulator.

Example

{
  "jsonrpc": "2.0", 
  "method": "StatusGet", 
  "id": 1234,
  "params": 0
}

Response

{
  "jsonrpc":"2.0", 
  "id":1234
  "result":{ 
    "Platform":"Core 500i", 
    "State":"Active",
    "DesignName":"SAF‐MainPA", 
    "DesignCode":"qALFilm6IcAz", 
    "IsRedundant":false, 
    "IsEmulator":true, 
    "Status":{
      "Code":0 
      "String":"OK"
    }
  }
}

Use these methods to get and set Named Control values.

Specify an array of Named Control strings, receive an array of control values.

Parameters

Array of Named Control strings, e.g.:

["Named_Control_Name", "Named_Control_Name"]

Response

Name : Name of the control, relative to the component.

Value : The value of the control. This can be a number, string, or boolean.

String : String representation of the control.

Example 1: Single Named Control

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "Control.Get",
  "params": ["MainGain"]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1234,
  "result": [
    {
      "Name": "MainGain", 
      "Value": ‐12
    }
  ]
}

Example 2: Multiple Named Controls

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method":  "Control.Get", 
  "params": ["MainGain", "MainMute"]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1234,
  "result": [
    {
      "Name": "MainGain", 
      "Value": ‐12 
      "String" : "‐12.0dB"
    },
    {
      "Name": "MainMute", 
      "Value": false, 
      "String" : "Unmuted"
    }
  ]
}

Set a control's value. Specify a single control name, value, and optional ramp time.

Parameters

Name : Name of the control, relative to the component.

Value : The value of the control. This can be a number, string, or boolean.

Ramp : (Optional) The ramp time used to set the control.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "Control.Set", 
  "params": {
    "Name": "MainGain", 
    "Value": ‐12
  }
}

Use these methods to get and set controls within Named Components, or obtain a list of all Named Components in a design.

Returns the values of one or more specified controls within a specified Named Component.

Parameters

Name : The name of the named component.

Controls : An array of control values.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "Component.Get", 
  "params": {
    "Name": "My APM",
    "Controls": [
      { "Name": "ent.xfade.gain" }
    ]
  }
}

Response

{
  "jsonrpc": "2.0", 
  "result": {
    "Name": "My APM",
    "Controls": [
    {
      "Name": "ent.xfade.gain", 
      "Value": ‐100.0,
      "String": "‐100.0dB" 
      "Position": 0
    }
    ]
  }
}

Returns a table of all controls and their values in a specified Named Component.

Parameters

Name : The name of the named component.

Example

{
    "jsonrpc": "2.0",
    "id": 1234,
    "method": "Component.GetControls",
    "params": {
        "Name": "MyGain"
    }
}

Response

{
    "jsonrpc": "2.0",
    "result": {
        "Name": "MyGain",
        "Controls": [
            {
                "Name": "bypass",
                "Type": "Boolean",
                "Value": false,
                "String": "no",
                "Position": 0.0,
                "Direction": "Read/Write"
            },
                "Name": "gain",
                "Type": "Float",
                "Value": 0.0,
                "ValueMin": -100.0,
                "ValueMax": 20.0,
                "StringMin": "-100dB",
                "StringMax": "20.0dB",
                "String": "0dB",
                "Position": 0.83333331,
                "Name": "invert",
                "String": "normal",
                "Name": "mute",
                "String": "unmuted",
            }
        ]
    },
    "id": 1234
}

Set one or more controls for a single named component. Returns a list of unknown controls after processing.

Parameters

Name : The name of the named component.

Controls : An array of control values.

Example 1: Set a single control

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "Component.Set", 
  "params": {
    "Name": "My APM",
    "Controls": [
      {
        "Name": "ent.xfade.gain", 
        "Value": ‐100.0,
        "Ramp": 2.0
      }
    ]
  }
}

Example 2: Set multiple controls

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "Component.Set", 
  "params": {
    "Name": "My APM",
    "Controls": [
      {
        "Name": "ent.xfade.gain", 
        "Value": ‐100.0,
        "Ramp": 2.0
      },
      {
        "Name": "bgm.xfade.gain", 
        "Value": 0.0,
        "Ramp": 1.0
      }
    ]
  }
}

Get a list of all named components in a design, along with their type and properties.

Parameters

NA

Example

{
  "jsonrpc": "2.0",
  "method": "Component.GetComponents", 
  "params": "test",
  "id": 1234
}

Response

{
  "jsonrpc": "2.0", 
  "result": [
    {
      "Name": "APM ABC",
      "Type": "apm",
      "Properties": []
    },
    {
      "Name": "My Delay Mixer", 
      "Type": "delay_matrix", 
      "Properties": [
        {
          "Name": "n_inputs",
          "Value": "8"
        },
        {
          "Name": "n_outputs",
          "Value": "8"
        },
        {
          "Name": "max_delay",
          "Value": "0.5"
        },
        {
          "Name": "delay_type", 
          "Value": "0"
        },
        {
          "Name": "linear_gain", 
          "Value": "False"
        },
        {
          "Name": "multi_channel_type", 
          "Value": "1"
        },
        {
          "Name": "multi_channel_count", 
          "Value": "8"
        }
      ]
    }
  ],
  "id": 1234
}

Use these methods to manipulate and poll change groups.

Add controls to a change group via Named Controls.

Parameters

Id : Change group ID.

Controls : Array of control names.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.AddControl", 
  "params": {
    "Id": "my change group", 
    "Controls" : [
      "some control", "another control"
    ]
  }
}

Add controls to a change group via a Named Component.

Parameters

Id : Change group ID.

Component : Named Component name and array of controls.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.AddComponentControl", 
  "params": {
    "Id": "my change group", 
    "Component" : {
      "Name": "My Component", 
      "Controls": [
        { "Name": "gain" },
        { "Name": "mute" }
      ]
    }
  }
}

Remove controls from a change group via Named Controls. Returns a list of unknown controls after processing.

Parameters

Id : Change group ID.

Controls : Array of control names.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.Remove", 
  "params": {
    "Id": "my change group" 
    "Controls" : [
      "some control"
    ]
  }
}

Poll a change group.

Parameters

Id : Change group ID.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.Poll", 
  "params": {
    "Id": "my change group"
  }
}

Response

{
  "jsonrpc": "2.0",
  "id": 1234,
  "result": {
    "Id": "my change group", 
    "Changes": [
      { // Named control return value 
      "Name": "some control", 
      "Value": ‐12
      "String": "‐12dB"
      },
      { // Named component return value 
      "Component": "My Component", 
      "Name": "gain",
      "Value": ‐12 
      "String": "‐12dB"
      }
    ]
  }
}

Destroy a change group.

Parameters

Id : Change group ID.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.Destroy", 
  "params": {
    "Id": "my change group"
  }
}

Invalidates a change group, which causes all controls to be resent.

Parameters

Id : Change group ID.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.Invalidate", 
  "params": {
    "Id": "my change group"
  }
}

Clears a change group, which removes all controls.

Parameters

Id : Change group ID.

Example

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.Clear", 
  "params": {
    "Id": "my change group"
  }
}

Set up automatic polling.

Parameters

Id : Change group ID.

Rate : The polling interval, in seconds.

Example

Configure automatic polling to receive a response every 5 seconds:

{
  "jsonrpc": "2.0",
  "id": 1234,
  "method": "ChangeGroup.AutoPoll", 
  "params": {
    "Id": "my change group" 
    "Rate": 5
  }
}

Response

{
  "jsonrpc": "2.0",
  "id": 1234,
  "result": {
    "Id": "my change group", 
    "Changes": [
      { // Named control return value 
        "Name": "some control", 
        "Value": ‐12
        "String": "‐12dB"
      },
      { // Named component return value 
        "Component": "My Component", 
        "Name": "gain",
        "Value": ‐12 
        "String": "‐12dB"
      }
    ]
  }
}

Use the mixer control API methods to set mixer input and output parameters.

String Syntax

The mixer control API uses a string specification to determine to which inputs and outputs to apply changes. The syntax supports space- or comma-separated numbers, ranges of numbers, all numbers (*), and negation of a selection with the ! operator. For example:

*

everything

1 2 3

channels 1, 2, 3

1-6

channels 1 through 6

1-6 9

channels 1 through 6 and 9

1-3 5-9

channels 1 through 3 and 5 through 9

1-8 !3

channels 1 through 8 except 3

* !3-5

everything but 3 through 5

Methods

Set the crosspoint gain value for specified mixer inputs and outputs over an optional ramp time.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Outputs : String specification of mixer outputs. See String Syntax.

Value : The gain value to set.

Ramp : Ramp time to use for setting the gain value.

Example

Set all crosspoints on a mixer to -100dB over 5 seconds.

{
  "jsonrpc": "2.0",
  "method": "Mixer.SetCrossPointGain", 
  "id": 1234,
  "params": {
    "Mixer": "Parade",
    "Inputs": "*",
    "Outputs": "*",
    "Value": ‐100.0,
    "Ramp": 5.0
  }
}

Set the crosspoint delay value for specified mixer inputs and outputs over an optional ramp time.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Outputs : String specification of mixer outputs. See String Syntax.

Value : The delay value to set.

Ramp : Ramp time to use for setting the delay value.

Enable or disable crosspoint muting for specified mixer inputs and outputs.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Outputs : String specification of mixer outputs. See String Syntax.

Value : The boolean mute value to set.

Enable or disable crosspoint solo for specified mixer inputs and outputs.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Outputs : String specification of mixer outputs. See String Syntax.

Value : The boolean solo value to set.

Set the gain value for specified mixer inputs over an optional ramp time.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Value : The input gain value to set.

Ramp : Ramp time to use for setting the input gain value.

Enable or disable muting for specified mixer inputs.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Value : The boolean input mute value to set.

Example

Mute inputs 4-6:

{
  "jsonrpc": "2.0",
  "method": "Mixer.SetInputMute", 
  "params": {
    "MixerName": "Parade", 
    "Inputs": "4‐6", 
    "Value": true,
    "Ramp": 0.0
  },
  "id": 1234
}

Enable or disable solo for specified mixer inputs.

Parameters

Name : Name of the mixer.

Inputs : String specification of mixer inputs. See String Syntax.

Value : The boolean input solo value to set.

Set the gain value for specified mixer outputs over an optional ramp time.

Parameters

Name : Name of the mixer.

Outputs : String specification of mixer outputs. See String Syntax.

Value : The output gain value to set.

Ramp : Ramp time to use for setting the output gain value.

Enable or disable muting for specified mixer outputs.

Parameters

Name : Name of the mixer.

Outputs : String specification of mixer outputs. See String Syntax.

Value : The boolean output mute value to set.

Enable or disable muting for specified mixer cues.

Parameters

Name : Name of the mixer.

Cues : String specification of mixer cues.

Value : The boolean cue mute value to set.

Set the gain value for specified mixer cues over an optional ramp time.

Parameters

Name : Name of the mixer.

Cues : String specification of mixer cues.

Value : The cue gain value to set.

Ramp : Ramp time to use for setting the cue gain value.

Enable or disable cues for specified mixer inputs.

Parameters

Name : Name of the mixer.

Cues : String specification of mixer cues.

Inputs : String specification of mixer inputs. See String Syntax.

Value : The boolean cue enable value to set.

Enable or disable cue AFL (After Fader Level) for specified mixer inputs.

Parameters

Name : Name of the mixer.

Cues : String specification of mixer cues.

Inputs : String specification of mixer inputs. See String Syntax.

Value : The boolean cue AFL value to set.

Use the Loop Player control API methods to queue up file playback into a named Loop Player.

Start audio playback.

Parameters

Name : The name of the Loop Player.

StartTime : The time of day, in seconds, to start the job.

Files : Array of file specifications, including:

Name : Name of the file to play.

Mode : mono | stereo

Output : The Loop Player output number for playback.

Loop : If true, file playback loops.

Seek : The optional time, in seconds, to seek into each file before playback.

Example

{
  "jsonrpc": "2.0",
  "method": "LoopPlayer.Start", 
  "params": {
    "Files": [
      {
        "Name": "Audio/mainloop.wav", 
        "Mode": "mono",
        "Output": 1
      }
    ],
    "Name": "test", 
    "StartTime": 62600, 
    "Loop": false, 
    "Log": true
  },
  "id": 1234
}

Stop audio playback for specified outputs.

Parameters

Name : The name of the Loop Player.

Outputs : The Loop Player output numbers for which to stop playback.

Example

{
  "jsonrpc": "2.0",
  "method": "LoopPlayer.Stop", 
  "params": {
    "Name": "test",
    "Outputs": [ 1, 3, 4 ], 
    "Log": true
  },
  "id": 1234
}

Cancel audio playback for specified outputs.

Parameters

Name : The name of the Loop Player.

Outputs : The Loop Player output numbers for which to stop playback.

Example

{
  "jsonrpc": "2.0",
  "method": "LoopPlayer.Cancel", 
  "params": {
    "Name": "test",
    "Outputs": [ 1, 3, 4 ], 
    "Log": true
  },
  "id": 1234
}

Use these methods to load and save snapshots.

Load control settings from a specified snapshot bank and number with an optional ramp time.

Parameters

Name : String. The name of the snapshot bank from which to load the snapshot. This is the name given to the bank when it was created in Q-SYS Designer Software.

Bank : Integer. Identifies a snapshot within a snapshot bank. The range is 1 to the number of snapshots in the bank, inclusive.

Ramp : Double. Optional argument, in seconds, for specifying the ramp time when loading the snapshot.

Example

From a snapshot bank called "MySpecialBank", load control settings from snapshot # 7 with a ramp time of 8.5 seconds...

{
  "jsonrpc": "2.0",
  "method": "Snapshot.Load", 
  "params": {
    "Name": "MySpecialBank",
    "Bank": 7, 
    "Ramp": 8.5
  },
  "id": 1234
}

Save control settings to a specified snapshot bank and number.

Parameters

Name : String. The name of the snapshot bank to which to save the snapshot. This is the name given to the bank when it was created in Q-SYS Designer Software.

Bank :  Integer. Identifies a snapshot within a snapshot bank. The range is 1 to the number of snapshots in the bank, inclusive.

Example

Save control settings to a snapshot bank called "MyVerySpecialBank" to snapshot # 4.

{
  "jsonrpc": "2.0",
  "method": "Snapshot.Save", 
  "params": {
    "Name": "MyVerySpecialBank",
    "Bank": 4, 
  },
  "id": 1234
}

These codes can be returned as the code value in a JSON-RPC error object.
Code Details

-32700

Parse error. Invalid JSON was received by the server.

-32600

Invalid request. The JSON sent is not a valid Request object.

-32601

Method not found.

-32602

Invalid params.

-32603

Server error.

-32604

Core is on Standby. This code is returned when a QRC command is received while the Core is not the active Core in a redundant Core configuration.

2

Invalid Page Request ID

3

Bad Page Request - could not create the requested Page Request

4

Missing file

5

Change Groups exhausted

6

Unknown change croup

7

Unknown component name

8

Unknown control

9

Illegal mixer channel index

10

Logon required