Ableton Link CHOP
The Ableton CHOP retrieves timing information from an Ableton Link supported network. For more information see: http://www.ableton.com/en/link/
The full support of the Ableton Live system is TDAbleton, a group of components that give you access to Ableton Songs, Tracks, Chains, Parameters and MIDI.
Ableton's Link FAQ is very helpful for issues on the Ableton end: https://help.ableton.com/hc/en-us/articles/209776125-Link-FAQs.
One common problem is that Ableton Link doesn't work with all sound drivers, including DirectX. The free application ASIO4All is an easy replacement that acts as a virtual ASIO device.
Parameters - Ableton Page
active - Turns the CHOP's output on or off.
enable - Initializes the connection to the Ableton Link session.
signature - Specifies the time signature. The first number is the number of beats per measure and the second number indicates the type of note that constitutes one beat. See Time Signature - Wikipedia for additional information.
callbacks - Path to a DAT containing callbacks for each event received.
Parameters - Output Page
ramp - Outputs a 0-1 ramp each bar.
pulse - Outputs a pulse each bar.
sine - Outputs a sine wave each bar.
count - Increases the count each bar.
countramp - A ramp that counts up until the bar is reset.
bar - Output the current bar.
beat - Output the current beat.
sixteenths - Output the current sixteenths.
rampbar - Outputs a 0-1 ramp each bar.
rampbeat - Outputs a 0-1 ramp each beat.
tempo - Outputs the current tempo (also known as BPM).
beats - Outputs the total number of beats.
phase - Outputs the current phase in the bar.
Parameters - Common Page
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 - 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.
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
autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is Path:Parameter are relative to.
exporttable - The DAT used to hold the export information when using the DAT Table Export Methods (See above).
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An which operate on (a series of numbers) which are used for animation, audio, mathematics, simulation, logic, UI construction, and many other applications.
Unlike a that connects nodes in the same , a Link is the dashed lines between nodes that represent other data flowing between nodes, like CHOP , node in parameters, and in parameters referencing CHOP channels, DAT tables and other nodes.
An that manipulates text strings: multi-line text or tables. Multi-line text is often a command , but can be any multi-line text. are rows and columns of cells, each containing a text string.
The location of an operator within the TouchDesigner environment, for example,
/geo1/torus1, a node called
torus1 in a component called
geo1. The path
/ is called . To refer instead to a filesystem folder, directory, disk file or
http: address, see .
To pulse a parameter is to send it a signal from a CHOP or python or a mouse click that causes a new action to occur immediately. A pulse from a CHOP is typically a 0 to 1 to 0 signal in a channel, and a pulse via python is via a
.pulse() call on a pulse-type parameter, such as Reset in a .
A 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 only contain the CHOP channels' samples between the last and the current cook frame.
A 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.
samples-per-second of a CHOP. Each CHOP in your network has a sample rate, whether it is used or not. The overall timeline has a "frame rate", which is the number of animation frames per second, generally your monitor display frequency.
Exporting 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 is on. The current value of a channel can be exported to a parameter of any operator, overriding that parameter's value. See .
Parameters in TouchDesigner are an operator's settings (numbers, menus, flags, strings, paths) which the user can alter. Parameters for any operator can be opened by right-clicking on the operator and selecting "Parameters..." A currently selected operator's parameters can be viewed in a by pressing the keyboard shortcut 'p'.
TouchDesigner is a hierarchy of components. "root" is the top-most network in the hierarchy. The is simply
/. A typical path is