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The DMX Out CHOP sends channels to DMX, Art-Net, sACN or FTDI devices. Channel values for DMX are 0-255.

The first channel you send into the DMX Out will correspond to the first DMX address (DMX channel) As you add channels to the DMX Out, you will access the next DMX channels in order. For example, if you input 12 channels into the DMX out, you will be controlling DMX channels 1 thru 12.

The DMX in TouchDesigner was developed on the ENTTEC device, namely their DMX USB Pro and DMX over Ethernet devices, but it should work for many devices and software that support DMX/Art-Net/sACN.

A Routing Table can be provided in a DAT where addresses can be specified by adding rows for each channel and specifying net, subnet and universe.

ENTTEC NOTE: - Use ENTTEC's NMU (Node Management Utility) to configure and inspect the ENTTEC devices found on your network.

macOS NOTE: - ENTTEC USB Pro may not connect automatically, to enable it enter the following command in the Terminal:

sudo kextunload -b

See also: Art-Net, sACN, DMX In CHOP, DMX


Parameters - DMX Page

Active active - Connects to the device while On.

Interface interface - - Select the type of interface to connect to the device with.

  • Enttec Generic Serial serial - Uses the operating system's serial calls to write data.
  • Enttec USB Pro enttecusbpro -
  • Enttec USB Pro Mk2 enttecusbpromk2 -
  • Art-Net artnet - Sets the interface to Art-Net protocol.
  • sACN sacn - Sets the interface to sACN protocol.

Format format - - Select between sending Packet Per Sample or Packet Per Channel.

  • Packet Per Sample packetpersample - Each channel acts as a DMX channel, ie. 512 channels for 1 universe.
  • Packet Per Channel packetperchan - Each sample in a channel acts as a DMX channel. This allows for setting up a channel for each universe, ie. 1 channel with 512 samples for 1 universe. Add multiple channels for multiple universes.

Routing Table routingtable - Available when using Packet Per Channel Format for Art-Net or sACN. Use the docked Table DAT to route channels to the appropriate universes. Addresses can be specified by adding rows for each channel and specifying net, subnet and universe. The net, subnet and universe columns are optional. If for example the net column is missing from the Routing Table, the Net parameter is used instead.

When removing the Routing Table from the parameter, the specified address will be used for the first channel while all other channels are assigned to consecutive addresses.

Note: For sACN the first available universe has the index 1 as universe 0 is reserved by the system for future use.

Send ArtSync sendartsync - When enabled will send out ArtSync packets. ArtSync packets are used to synchronize multiple universes together.

Device device - Select a DMX device from the menu.

Serial Port serialport - When the Interface parameter is set to Generic Serial this parameter lets you select which Serial (COM) port to use.

Rate rate - How often data is sent to the device (per second).

       WARNING: DMX512 devices have a maximum refresh rate of 44Hz. It is recommended that Rate <= 44 for reliable performance.

Net (0-127) net - When the Interface parameter is set to Art-Net, this sets the net address. A net is a groups of 16 consecutive subnets or 256 consecutive universes. The range for this parameter is 0-127. This is not a network IP address.

Subnet (0-15) subnet - When the Interface parameter is set to Art-Net, this sets the subnet address. A subnet is a group of 16 consecutive universes. The range for this parameter is 0-15. This is not a network subnet mask.

Universe (0-15) universe - When the Interface parameter is set to Art-Net, this sets the universe address. A single DMX512 frame of 512 channels is referred to as a universe. The range for this parameter is 0-15.

CID cid - The unique ID of the sender.

Source source - User assigned name of source (for informative purposes).

Priority priority - The priority of the data being sent, if there are multiple sources.

Parameters - Network Page

Multicast multicast - Enable multicast for sACN. Multicast automatically builds the IP based on Net, Subnet, and Universe of the device. This allows for sending to multiple devices at once by specifying multiple universes.

Network Address netaddress - Specify the IP address to use when Interface is set to Art-Net. This address corresponds to the receiving device address. When the address is set to its default, the messages are instead broadcast to all devices on the network. The Art-Net Net, Subnet and Universe of the receiving devices must still match those specified in the DMX Out CHOP in all cases.

Local Address localaddress - When the sending machine is equipped with multiple network adapters, this parameter can be used to choose which adapter to send the data from by specifying its IP address here.

Local Port localport - In rare cases it can be necessary to supply a custom port from which the data should be sent. The default of -1 means the O/S assigned port is being used.

Use Custom Port customport - Enable the Network Port parameter to specify the port of the receiving hardware.

Network Port netport - Let's you specify the port of the receiving hardware. By default and the spec of ArtNet this is set to 6454 and should only be changed in rare cases.

Parameters - Common Page

Time Slice timeslice - Turning this on forces the channels to be "Time Sliced". A Time Slice is the time between the last cook frame and the current cook frame.

Scope scope - To determine which channels get affected, some CHOPs use a Scope string on the Common page.

Sample Rate Match 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.

  • Resample At First Input's Rate first - Use rate of first input to resample others.
  • Resample At Maximum Rate max - Resample to the highest sample rate.
  • Resample At Minimum Rate min - Resample to the lowest sample rate.
  • Error If Rates Differ err - Doesn't accept conflicting sample rates.

Export Method exportmethod - - This will determine how to connect the CHOP channel to the parameter. Refer to the Export article for more information.

  • DAT Table by Index datindex - Uses the docked DAT table and references the channel via the index of the channel in the CHOP.
  • DAT Table by Name datname - Uses the docked DAT table and references the channel via the name of the channel in the CHOP.
  • Channel Name is Path:Parameter autoname - The channel is the full destination of where to export to, such has geo1/transform1:tx.

Export Root autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is Path:Parameter are relative to.

Export Table exporttable - The DAT used to hold the export information when using the DAT Table Export Methods (See above).

Operator Inputs

  • Input 0 -

Info CHOP Channels

Extra Information for the DMX Out CHOP can be accessed via an Info CHOP.

Common CHOP Info Channels

  • start - Start of the CHOP interval in samples.
  • length - Number of samples in the CHOP.
  • sample_rate - The samplerate of the channels in frames per second.
  • num_channels - Number of channels in the CHOP.
  • time_slice - 1 if CHOP is Time Slice enabled, 0 otherwise.
  • export_sernum - A count of how often the export connections have been updated.

Common Operator Info Channels

  • total_cooks - Number of times the operator has cooked since the process started.
  • cook_time - Duration of the last cook in milliseconds.
  • cook_frame - Frame number when this operator was last cooked relative to the component timeline.
  • cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.
  • cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.
  • cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.
  • cooked_this_frame - 1 if operator was cooked this frame.
  • warnings - Number of warnings in this operator if any.
  • errors - Number of errors in this operator if any.

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