{
  "id": "serial_chop",
  "name": "Serial CHOP",
  "displayName": "Serial CHOP",
  "category": "CHOP",
  "subcategory": "Generators",
  "version": "",
  "lastUpdated": "2025-08-07T07:50:09.334Z",
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  "description": "The Serial CHOP is used for serial communication through an external port, using the RS-232 protocol. These ports are usually a 9 pin connector, or a USB port on new machines. (Using a USB port requires a USB-to-serial adaptor and driver.) All of a computer's available serial ports can be found in the Device Manager under the Windows operating system. Their names begin with 'COM'. Example: COM1, COM2, COM3, etc.",
  "summary": "The Serial CHOP is used for serial communication through an external port, using the RS-232 protocol. These ports are usually a 9 pin connector, or a USB port on new machines. (Using a USB port requir",
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      "description": "From Derivative\n\t\t\n\t\t\n\t\t\n\t\t\n\t\tJump to navigation\n\t\tJump to search\n\t\t\nThe Serial  is used for serial communication through an external port, using the RS-232 protocol. These ports are usually a 9 pin connector, or a USB port on new machines. (Using a USB port requires a USB-to-serial adaptor and driver.) All of a computer's available serial ports can be found in the Device Manager under the Windows operating system. Their names begin with 'COM'. Example: COM1, COM2, COM3, etc.\t\t\nThis  monitors changes in its input channels, and sends the corresponding script through the serial connection.\t\t\t\nAny ASCII numeric digits '0'..'9' that are received, are stored and reflected in the output channel named 'return'.\t\t\t\nWhen you need to receive more complex data, other than simple ASCII numbers use the Serial DAT.\t\t\t\nSee also Serial DAT, serialDAT_Class, Arduino.\nserialCHOP_Class\n\nContents\n \n \n \n \n \n \n \n \n\n\n\n\n\n  active - This check box enables the serial connection.\n\n\n\n  state -  - The type of input transition to monitor.\n\n offtoon - on - ontooff - off - valuechange -\n\n  port -  - Selects the COM port that the serial connection will use.\n\n com3 -\n\n  baudrate - The maximum number of bits of information, including \"control\" bits, that are transmitted per second. Check your input device's default baud rate and set accordingly.\n\n\n\n  baudmenu -  - Use this menu to select from some commonly used baud rates.\n\n 1200 - 2400 - 9600 - 19200 - 38400 - 57600 - 115200 - 230400 - 460800 - 921600 - 1382400 -\n\n  databits -  - This parameter sets the number of data bits sent in each. Data bits are transmitted \"backwards\". Backwards refers to the order of transmission, which is from least significant bit (LSB) to most significant bit (MSB). To interpret the data bits, you must read from right to left.\n\n 6 - 7 - 8 - 9 -\n\n  parity -  - This parameter can be set to none, even, or odd. The optional parity bit follows the data bits and is included as a simple means of error checking. Parity bits work by specifying ahead of time whether the parity of the transmission is to be even or odd. If the parity is set to be odd, the transmitter will then set the parity bit in such a way as to make an odd number of 1's among the data bits and the parity bit.\n\n even - odd - none -\n\n  stopbits -  - The last part of transmission packet consists of 1 or 2 Stop bits. The connection will now wait for the next Start bit.\n\n 1 - 2 -\n\n\n\n  script - Sequence of scripts corresponding to input channels. These strings are sent out the serial port when the corresponding channel change is detected. For example,  2 is sent to the serial port when the third input channel goes from off to on. These scripts will also convert escape sequences like <CR> and \\n for carriage returns and \\r for line feed.\n\n\n\n  script0callback - Enter the script for  0 here.\n\n\n\n\n\n\n  timeslice - Turning this on forces the channels to be \"Time Sliced\".  A  is the time between the last cook frame and the current cook frame.\n\n\n\n  scope - To determine which channels get affected, some CHOPs use a  string on the Common page. See Pattern Matching.\n\n\n\n  srselect -  - Handle cases where multiple input CHOPs' sample rates are different. When Resampling occurs, the curves are interpolated according to the Interpolation Method Option, or \"Linear\" if the Interpolate Options are not available.\n\n first - Use rate of first input to resample others. max - Resample to the highest sample rate. min - Resample to the lowest sample rate. err - Doesn't accept conflicting sample rates.\n\n  exportmethod -  - This will determine how to connect the  channel to the parameter. Refer to the Export article for more information.\n\n datindex - Uses the docked  table and references the channel via the index of the channel in the . datname - Uses the docked  table and references the channel via the name of the channel in the . autoname - The channel is the full destination of where to export to, such has geo1/transform1:tx.\n\n  autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is : are relative to.\n\n\n\n  exporttable - The  used to hold the export information when using the  Table  Methods (See above).\n\n\n\n\n\n -\n\nExtra Information for the Serial  can be accessed via an Info CHOP.\n\n\n\n - Start of the  interval in samples. - Number of samples in the . - The samplerate of the channels in frames per second. - Number of channels in the . - 1 if  is  enabled, 0 otherwise. - A count of how often the export connections have been updated.\n - Number of times the operator has cooked since the process started. - Duration of the last cook in milliseconds. - Frame number when this operator was last cooked relative to the component timeline. - Frame number when this operator was last cooked relative to the absolute time. - Time in milliseconds at which the operator started cooking in the frame it was cooked. - Time in milliseconds at which the operator finished cooking in the frame it was cooked. - 1 if operator was cooked this frame. - Number of warnings in this operator if any. - Number of errors in this operator if any.\nTouchDesigner Build: Latest\\nwikieditorwikieditor2021.100002020.200002018.28070before 2018.28070\nCHOPs\n• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • \n\nAn Operator Family which operate on Channels (a sequence of numbers (Samples)) which are used for animation, audio, mathematics, simulation, logic, UI construction, and data streamed from/to devices and protocols.\n\n\n\nA set of commands located in a Text DAT that are triggered to run under certain conditions. There are two scripting languages in TouchDesigner: Python and the original Tscript. Scripts and single-line commands can also be run in the Textport.\n\n\n\nSome operators have a DAT docked to them that contains some python functions. These functions, called \"callbacks\", get called when something in the operator changes.\n\n\n\nA Time Slice is the time from the last cook frame to the current cook frame. In CHOPs it is the set of short channels that contain the CHOP channels' samples between the last and the current cook frame.\n\n\n\nA parameter in most CHOPs that restricts which channels of that CHOP will be affected. Normally all channels of a CHOP are affected by the operator. TOPs have Channel Mask, a similar feature.\n\n\n\nsamples-per-second of a CHOP. Each CHOP in your network has a sample rate. In contrast, the overall timeline has a Frame Rate, which is the number of frames to cook and display per second, generally your monitor display frequency, default 60.\n\n\n\nExporting is the connection of CHOP channels to parameters of operators. The output of each exporting CHOP is one or more channels, active only while the CHOP Viewer is on. The current value of a channel can be exported to a parameter of any operator, overriding that parameter's value. See Parameter.\n\n\n\nAn Operator Family that manipulates text strings: multi-line text or tables. Multi-line text is often a python Script or GLSL Shader, but can be any multi-line text. Tables are rows and columns of cells, each containing a text string.\n\n\n\nThe location of an operator within the TouchDesigner environment, for example, /geo1/circle1, a node called circle1 in a component called geo1. The path / is called Root. 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      "description": "From Derivative\n\t\t\n\t\t\n\t\t\n\t\t\n\t\tJump to navigation\n\t\tJump to search\n\t\t\nThe Serial  is used for serial communication through an external port, using the RS-232 protocol. These ports are usually a 9 pin connector, or a USB port on new machines. (Using a USB port requires a USB-to-serial adaptor and driver.) All of a computer's available serial ports can be found in the Device Manager under the Windows operating system. Their names begin with 'COM'. Example: COM1, COM2, COM3, etc.\t\t\nThis  monitors changes in its input channels, and sends the corresponding script through the serial connection.\t\t\t\nAny ASCII numeric digits '0'..'9' that are received, are stored and reflected in the output channel named 'return'.\t\t\t\nWhen you need to receive more complex data, other than simple ASCII numbers use the Serial DAT.\t\t\t\nSee also Serial DAT, serialDAT_Class, Arduino.\nserialCHOP_Class\n\nContents\n \n \n \n \n \n \n \n \n\n\n\n\n\n  active - This check box enables the serial connection.\n\n\n\n  state -  - The type of input transition to monitor.\n\n offtoon - on - ontooff - off - valuechange -\n\n  port -  - Selects the COM port that the serial connection will use.\n\n com3 -\n\n  baudrate - The maximum number of bits of information, including \"control\" bits, that are transmitted per second. Check your input device's default baud rate and set accordingly.\n\n\n\n  baudmenu -  - Use this menu to select from some commonly used baud rates.\n\n 1200 - 2400 - 9600 - 19200 - 38400 - 57600 - 115200 - 230400 - 460800 - 921600 - 1382400 -\n\n  databits -  - This parameter sets the number of data bits sent in each. Data bits are transmitted \"backwards\". Backwards refers to the order of transmission, which is from least significant bit (LSB) to most significant bit (MSB). To interpret the data bits, you must read from right to left.\n\n 6 - 7 - 8 - 9 -\n\n  parity -  - This parameter can be set to none, even, or odd. The optional parity bit follows the data bits and is included as a simple means of error checking. Parity bits work by specifying ahead of time whether the parity of the transmission is to be even or odd. If the parity is set to be odd, the transmitter will then set the parity bit in such a way as to make an odd number of 1's among the data bits and the parity bit.\n\n even - odd - none -\n\n  stopbits -  - The last part of transmission packet consists of 1 or 2 Stop bits. The connection will now wait for the next Start bit.\n\n 1 - 2 -\n\n\n\n  script - Sequence of scripts corresponding to input channels. These strings are sent out the serial port when the corresponding channel change is detected. For example,  2 is sent to the serial port when the third input channel goes from off to on. These scripts will also convert escape sequences like <CR> and \\n for carriage returns and \\r for line feed.\n\n\n\n  script0callback - Enter the script for  0 here.\n\n\n\n\n\n\n  timeslice - Turning this on forces the channels to be \"Time Sliced\".  A  is the time between the last cook frame and the current cook frame.\n\n\n\n  scope - To determine which channels get affected, some CHOPs use a  string on the Common page. See Pattern Matching.\n\n\n\n  srselect -  - Handle cases where multiple input CHOPs' sample rates are different. When Resampling occurs, the curves are interpolated according to the Interpolation Method Option, or \"Linear\" if the Interpolate Options are not available.\n\n first - Use rate of first input to resample others. max - Resample to the highest sample rate. min - Resample to the lowest sample rate. err - Doesn't accept conflicting sample rates.\n\n  exportmethod -  - This will determine how to connect the  channel to the parameter. Refer to the Export article for more information.\n\n datindex - Uses the docked  table and references the channel via the index of the channel in the . datname - Uses the docked  table and references the channel via the name of the channel in the . autoname - The channel is the full destination of where to export to, such has geo1/transform1:tx.\n\n  autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is : are relative to.\n\n\n\n  exporttable - The  used to hold the export information when using the  Table  Methods (See above).\n\n\n\n\n\n -\n\nExtra Information for the Serial  can be accessed via an Info CHOP.\n\n\n\n - Start of the  interval in samples. - Number of samples in the . - The samplerate of the channels in frames per second. - Number of channels in the . - 1 if  is  enabled, 0 otherwise. - A count of how often the export connections have been updated.\n - Number of times the operator has cooked since the process started. - Duration of the last cook in milliseconds. - Frame number when this operator was last cooked relative to the component timeline. - Frame number when this operator was last cooked relative to the absolute time. - Time in milliseconds at which the operator started cooking in the frame it was cooked. - Time in milliseconds at which the operator finished cooking in the frame it was cooked. - 1 if operator was cooked this frame. - Number of warnings in this operator if any. - Number of errors in this operator if any.\nTouchDesigner Build: Latest\\nwikieditorwikieditor2021.100002020.200002018.28070before 2018.28070\nCHOPs\n• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • \n\nAn Operator Family which operate on Channels (a sequence of numbers (Samples)) which are used for animation, audio, mathematics, simulation, logic, UI construction, and data streamed from/to devices and protocols.\n\n\n\nA set of commands located in a Text DAT that are triggered to run under certain conditions. There are two scripting languages in TouchDesigner: Python and the original Tscript. Scripts and single-line commands can also be run in the Textport.\n\n\n\nSome operators have a DAT docked to them that contains some python functions. These functions, called \"callbacks\", get called when something in the operator changes.\n\n\n\nA Time Slice is the time from the last cook frame to the current cook frame. In CHOPs it is the set of short channels that contain the CHOP channels' samples between the last and the current cook frame.\n\n\n\nA parameter in most CHOPs that restricts which channels of that CHOP will be affected. Normally all channels of a CHOP are affected by the operator. TOPs have Channel Mask, a similar feature.\n\n\n\nsamples-per-second of a CHOP. Each CHOP in your network has a sample rate. In contrast, the overall timeline has a Frame Rate, which is the number of frames to cook and display per second, generally your monitor display frequency, default 60.\n\n\n\nExporting is the connection of CHOP channels to parameters of operators. The output of each exporting CHOP is one or more channels, active only while the CHOP Viewer is on. The current value of a channel can be exported to a parameter of any operator, overriding that parameter's value. See Parameter.\n\n\n\nAn Operator Family that manipulates text strings: multi-line text or tables. Multi-line text is often a python Script or GLSL Shader, but can be any multi-line text. Tables are rows and columns of cells, each containing a text string.\n\n\n\nThe location of an operator within the TouchDesigner environment, for example, /geo1/circle1, a node called circle1 in a component called geo1. The path / is called Root. 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      "description": "The Serial  is used for serial communication through an external port, using the RS-232 protocol. These ports are usually a 9 pin connector, or a USB port on new machines. (Using a USB port requires a USB-to-serial adaptor and driver.) All of a computer's available serial ports can be found in the Device Manager under the Windows operating system. Their names begin with 'COM'. Example: COM1, COM2, COM3, etc.\t\t\nThis  monitors changes in its input channels, and sends the corresponding script through the serial connection.\t\t\t\nAny ASCII numeric digits '0'..'9' that are received, are stored and reflected in the output channel named 'return'.\t\t\t\nWhen you need to receive more complex data, other than simple ASCII numbers use the Serial DAT.\t\t\t\nSee also Serial DAT, serialDAT_Class, Arduino.\nserialCHOP_Class\n\nContents\n \n \n \n \n \n \n \n \n\n\n\n\n\n  active - This check box enables the serial connection.\n\n\n\n  state -  - The type of input transition to monitor.\n\n offtoon - on - ontooff - off - valuechange -\n\n  port -  - Selects the COM port that the serial connection will use.\n\n com3 -\n\n  baudrate - The maximum number of bits of information, including \"control\" bits, that are transmitted per second. Check your input device's default baud rate and set accordingly.\n\n\n\n  baudmenu -  - Use this menu to select from some commonly used baud rates.\n\n 1200 - 2400 - 9600 - 19200 - 38400 - 57600 - 115200 - 230400 - 460800 - 921600 - 1382400 -\n\n  databits -  - This parameter sets the number of data bits sent in each. Data bits are transmitted \"backwards\". Backwards refers to the order of transmission, which is from least significant bit (LSB) to most significant bit (MSB). To interpret the data bits, you must read from right to left.\n\n 6 - 7 - 8 - 9 -\n\n  parity -  - This parameter can be set to none, even, or odd. The optional parity bit follows the data bits and is included as a simple means of error checking. Parity bits work by specifying ahead of time whether the parity of the transmission is to be even or odd. If the parity is set to be odd, the transmitter will then set the parity bit in such a way as to make an odd number of 1's among the data bits and the parity bit.\n\n even - odd - none -\n\n  stopbits -  - The last part of transmission packet consists of 1 or 2 Stop bits. The connection will now wait for the next Start bit.\n\n 1 - 2 -\n\n\n\n  script - Sequence of scripts corresponding to input channels. These strings are sent out the serial port when the corresponding channel change is detected. For example,  2 is sent to the serial port when the third input channel goes from off to on. These scripts will also convert escape sequences like <CR> and \\n for carriage returns and \\r for line feed.\n\n\n\n  script0callback - Enter the script for  0 here.\n\n\n\n\n\n\n  timeslice - Turning this on forces the channels to be \"Time Sliced\".  A  is the time between the last cook frame and the current cook frame.\n\n\n\n  scope - To determine which channels get affected, some CHOPs use a  string on the Common page. See Pattern Matching.\n\n\n\n  srselect -  - Handle cases where multiple input CHOPs' sample rates are different. When Resampling occurs, the curves are interpolated according to the Interpolation Method Option, or \"Linear\" if the Interpolate Options are not available.\n\n first - Use rate of first input to resample others. max - Resample to the highest sample rate. min - Resample to the lowest sample rate. err - Doesn't accept conflicting sample rates.\n\n  exportmethod -  - This will determine how to connect the  channel to the parameter. Refer to the Export article for more information.\n\n datindex - Uses the docked  table and references the channel via the index of the channel in the . datname - Uses the docked  table and references the channel via the name of the channel in the . autoname - The channel is the full destination of where to export to, such has geo1/transform1:tx.\n\n  autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is : are relative to.\n\n\n\n  exporttable - The  used to hold the export information when using the  Table  Methods (See above).\n\n\n\n\n\n -\n\nExtra Information for the Serial  can be accessed via an Info CHOP.\n\n\n\n - Start of the  interval in samples. - Number of samples in the . - The samplerate of the channels in frames per second. - Number of channels in the . - 1 if  is  enabled, 0 otherwise. - A count of how often the export connections have been updated.\n - Number of times the operator has cooked since the process started. - Duration of the last cook in milliseconds. - Frame number when this operator was last cooked relative to the component timeline. - Frame number when this operator was last cooked relative to the absolute time. - Time in milliseconds at which the operator started cooking in the frame it was cooked. - Time in milliseconds at which the operator finished cooking in the frame it was cooked. - 1 if operator was cooked this frame. - Number of warnings in this operator if any. - Number of errors in this operator if any.\nTouchDesigner Build: Latest\\nwikieditorwikieditor2021.100002020.200002018.28070before 2018.28070\nCHOPs\n• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • \n\nAn Operator Family which operate on Channels (a sequence of numbers (Samples)) which are used for animation, audio, mathematics, simulation, logic, UI construction, and data streamed from/to devices and protocols.\n\n\n\nA set of commands located in a Text DAT that are triggered to run under certain conditions. There are two scripting languages in TouchDesigner: Python and the original Tscript. Scripts and single-line commands can also be run in the Textport.\n\n\n\nSome operators have a DAT docked to them that contains some python functions. These functions, called \"callbacks\", get called when something in the operator changes.\n\n\n\nA Time Slice is the time from the last cook frame to the current cook frame. In CHOPs it is the set of short channels that contain the CHOP channels' samples between the last and the current cook frame.\n\n\n\nA parameter in most CHOPs that restricts which channels of that CHOP will be affected. Normally all channels of a CHOP are affected by the operator. TOPs have Channel Mask, a similar feature.\n\n\n\nsamples-per-second of a CHOP. Each CHOP in your network has a sample rate. In contrast, the overall timeline has a Frame Rate, which is the number of frames to cook and display per second, generally your monitor display frequency, default 60.\n\n\n\nExporting is the connection of CHOP channels to parameters of operators. The output of each exporting CHOP is one or more channels, active only while the CHOP Viewer is on. The current value of a channel can be exported to a parameter of any operator, overriding that parameter's value. See Parameter.\n\n\n\nAn Operator Family that manipulates text strings: multi-line text or tables. Multi-line text is often a python Script or GLSL Shader, but can be any multi-line text. Tables are rows and columns of cells, each containing a text string.\n\n\n\nThe location of an operator within the TouchDesigner environment, for example, /geo1/circle1, a node called circle1 in a component called geo1. The path / is called Root. This path is displayed at the top of every Pane, showing which Component's network you are currently in. To refer instead to a filesystem folder, directory, disk file or http: address, see Folder.\n\n\n\nEvery operator in TouchDesigner has a set of control Parameters that can be integer or floating point numbers, menus, binary toggles, text strings or operator paths, which determine the output of the operator.\n\n\n\nTouchDesigner is a hierarchy of components. \"root\" is the top-most network in the hierarchy. The Network Path or Path for root is simply /. A typical path is /project1/moviein1.\n\n\n\n\n\n\n\n\nRetrieved from \"https://docs.derivative.ca/index.php?title=Serial_CHOP&oldid=32291\"",
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      "description": "active - This check box enables the serial connection.",
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      "description": "state -  - The type of input transition to monitor.\n\n offtoon - on - ontooff - off - valuechange -",
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      "description": "port -  - Selects the COM port that the serial connection will use.\n\n com3 -",
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      "name": "COM3",
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      "name": "Baud Rate",
      "label": "Baud Rate",
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      "description": "baudrate - The maximum number of bits of information, including \"control\" bits, that are transmitted per second. Check your input device's default baud rate and set accordingly.",
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      "description": "baudmenu -  - Use this menu to select from some commonly used baud rates.\n\n 1200 - 2400 - 9600 - 19200 - 38400 - 57600 - 115200 - 230400 - 460800 - 921600 - 1382400 -",
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      "name": "Data Bits",
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      "description": "databits -  - This parameter sets the number of data bits sent in each. Data bits are transmitted \"backwards\". Backwards refers to the order of transmission, which is from least significant bit (LSB) to most significant bit (MSB). To interpret the data bits, you must read from right to left.\n\n 6 - 7 - 8 - 9 -",
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      "description": "parity -  - This parameter can be set to none, even, or odd. The optional parity bit follows the data bits and is included as a simple means of error checking. Parity bits work by specifying ahead of time whether the parity of the transmission is to be even or odd. If the parity is set to be odd, the transmitter will then set the parity bit in such a way as to make an odd number of 1's among the data bits and the parity bit.\n\n even - odd - none -",
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      "description": "stopbits -  - The last part of transmission packet consists of 1 or 2 Stop bits. The connection will now wait for the next Start bit.\n\n 1 - 2 -",
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      "label": "Time Slice",
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      "description": "timeslice - Turning this on forces the channels to be \"Time Sliced\".  A  is the time between the last cook frame and the current cook frame.",
      "tooltip": "",
      "help": "",
      "units": "",
      "examples": [],
      "isReadOnly": false,
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      "description": "scope - To determine which channels get affected, some CHOPs use a  string on the Common page. See Pattern Matching.",
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      "isReadOnly": false,
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      "label": "Sample Rate Match",
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      "description": "srselect -  - Handle cases where multiple input CHOPs' sample rates are different. When Resampling occurs, the curves are interpolated according to the Interpolation Method Option, or \"Linear\" if the Interpolate Options are not available.\n\n first - Use rate of first input to resample others. max - Resample to the highest sample rate. min - Resample to the lowest sample rate. err - Doesn't accept conflicting sample rates.",
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      "description": "first - Use rate of first input to resample others. max - Resample to the highest sample rate. min - Resample to the lowest sample rate. err - Doesn't accept conflicting sample rates.",
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      "description": "autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is : are relative to.",
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      "description": "exporttable - The  used to hold the export information when using the  Table  Methods (See above).",
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