Sampling and Aliasing

Interactions

Drag the camera crank up or down to crank faster or slower: the frame rate and the pin rate change together
Drag the fresh pricks on the strip sideways to space the pins wider or closer (the same sampling rate)
Drag the pointer f along the pencil scale to set the signal and wheel frequency; it returns to the programme after 6 s
Click the spring-and-dashpot damper (or the grid in the corner) to swing the anti-alias filter in or out
Press and turn the wheel to spin it by hand at any speed, or click it for a flick; it coasts back to its drive
Click the shirt to twist it; pointer movement is wind that turns it on its hanger