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When getting started in TouchDesigner we often use Channel Operators (CHOPs) that contain a single sample or a single value. These CHOPs look like a horizontal bar graph that displays a channel’s name and its value. Single Sample CHOPs are often used with the intention of manipulating this single value so that it can be used to drive the parameter of another operator.
For example, we might combine an LFO CHOP and a Count CHOP to create a counter. Similarly, we might use an LFO CHOP with a Filter or Lag CHOP to interpolate between two different states, which will in turn create a smooth transition in value of a parameters of another operator. The Keyboard In CHOP is another example of how we can use a keyboard input to drive control changes to operators in our networks.