File In CHOP
The File In CHOP reads in channel and audio files for use by CHOPs. The file can be read in from disk or from the web. Use
http:// when specifying a URL.
For a complete listing of all valid formats for CHOPs, see the File Types section. The types of files that can be read into CHOPs include:
.chan- Raw ASCII channel files; a row of numbers per frame. The channels are named automatically.
.clip .bclip- Touch native CHOP clip files.
.aiff- Audio files.
.wav- Audio files.
Outputting Channel Files
The same files can be output from the RMB menu on the CHOP by selecting Save Data Channels.
Other Input Devices
For MIDI files (
.midi), see the MIDI In CHOP.
Parameters - File In Page
file - The name of the file to load. Use http:// when specifying a URL.
nameoption - ⊞ - Use this menu to control the names of the loaded channels.
- Use Names In File
infile- Use the channel names stored in the file.
- Use New Names
new- Use the name specified in the Name parameter.
- Use Filename
filename- Use the filename as the name for the loaded channels.
name - Used to name the channels when the Name Options parameter is set to Use New Names.
rateoption - ⊞ - Use this menu to adjust the sample rate of the loaded channels.
- No Change
nochange- The sample rate is taken from the file.
override- The sample rate is set to the number in the Sample Rate parameter, but the channels in the file are not resampled.
resample- Resamples at the specified Sample Rate. Takes the channels and the sample rate found in the file, and resamples it to the desired sample rate. This prevents very large arrays from being used in memory unnecessarily.
rate - Samples per second, as utilized by the Rate Options parameter.
left - ⊞ - The left extend conditions (before/after range).
- No Change
- Default Value
right - ⊞ - The right extend conditions (before/after range).
- No Change
- Default Value
defval - The default value for extend conditions.
renamefrom - The channel pattern to rename. See Pattern Matching.
renameto - The replacement pattern for the names. The default parameters do not rename the channels. See Pattern Matching.
Value Override Pattern
overridpattern - Scopes channels to apply the Override Value to.
overridevalue - The value given to channels scope by the Value Override Pattern parameter above.
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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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.
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 Speed CHOP.
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.
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'.