The Record CHOP takes the channels coming in the first (Position) input, converts and records them internally, and outputs the stored channels as the CHOP output. The optional second (Active) input is used to enable and disable the recording.
During recording, the Record CHOP uses only the values of the first input at the current frame. The Type determines how the input values are converted.
Tip: The Trail CHOP also records the last window of samples, and more powerfully, the gestureCapture component in the Palette gives more control over multi-captures and smoothing channel data.
If Record is set to Auto Range, and the Active input goes on, and TouchDesigner is playing, then any existing storage array is cleared, and the channels are recorded in a new storage array until Active goes off. This behaves like a sampler.
The Mouse In CHOP and Keyboard In CHOP are often attached to the Position and Active inputs respectively of the Record CHOP to perform the recording of channels from mouse movements, enabled by pressing a keyboard key (see the Keyboard In CHOP).
Record Segment is useful for recording trails, snakes, and other models that use a time-history of motion.
See the Time Slice CHOP for input smoothing.
Parameters - Control Page
record - ⊞ - When and how much to record:
off- Leaves the output unmodified.
on- Always records when playing forward. When the active input is in the off state the input is maintained at its current values.
add- Adds (offsets) to an existing set of channels previously recorded in the Record CHOP. The channels are left unmodified while the Active input is in the off state.
- Auto Range
auto- Creates an interval based on Active on/off.
sample - ⊞ - Determines whether record should sample the time slice or the current frame. You would generally want to use Current Time Slice, for audio, as all frames will be evaluated.
If the interval is set to be the Current Frame, it will always cook (only look at) the current frame (things downstream still cook regardless of this setting however). Thus, it should generally not be used for audio, but rather fro things like device input, because it interpolates the values between the captured frames.
- Current Frame
- Current Time Slice
interp - ⊞ - Determines how to compute missed input samples using interpolation. Using Hold Previous Value does just that; Linear and Cubic interpolation will create a mathematical blend of values in a linear (straight line between values in time), or cubic (smooth round-off curve between beginning and ending values).
- Hold Previous Value
output - ⊞ - Determines the frame range that gets output from the CHOP.
- Full Range
full- The frame range grows from the moment and frame you start recording. Samples get recorded over when TouchDesigner goes over a frame a second time. Press Reset Channels to start again.
- Current Frame
curframe- Outputs the current frame only.
- Current Frame at Frame 1
frame1- Outputs the current frame but shifts it to frame 1. If the channels are not changing value, it reduces the amount of cooking that takes place.
- Current Time Slice
slice- Outputs the current Time Slice of samples only.
segment- Outputs a sliding window of samples defined by the Record Segment start/end length.
segment - ⊞ - The data gets recorded in a fixed-range interval and the most recent data gets recorded at the end of the interval and the remaining samples get shifted toward the start of the interval. This is useful for making snakes.
Record Segment Unit
reset - The current output is cleared and all subsequent channels will commence single sample lengths.
resetcondition - ⊞ -
- Off to On
- While On
- On to Off
- While Off
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).
- Input 0 -
- Input 1 -
- Input 2 -
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A built-in panel in TouchDesigner that contains a library of components and media that can be dragged-dropped into a TouchDesigner network.
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.
The term "Frame" is used (1) in the Timeline, (2) as a time-unit in CHOPs, (3) as a time-unit in TOPs, and (4) with movies images which are read and created with TOPs.
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 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.
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 Network Editor by pressing the keyboard shortcut 'p'.