morphazoid
An animated contour read by a scanning line or tracing points.

Drag the contour to spin it while automatic rotation is off. Drag elsewhere to scrub. Choose one of 36 full-instrument presets beside the sound meters; the next button and unmodified arrow keys on the page cycle presets. Each preset recalls its playhead and rotation on/off switches, speeds, directions, and head spacing. Audio stays under your control and the current playhead position and rotation angle are retained. When this canvas is focused, Left or Right Arrow moves by a fine step, or hold Shift for a larger step. Press Space to play or pause. Audio and movement are independent.