A line sweeps across each drawing. The organ plays every stroke it crosses, at the height where it crosses.
how the organ reads a drawing
- the lineIt crosses the drawing from left to right, or from top to bottom, in about a minute.
- a strokeEach stroke under the line plays one note, at the height where the line meets it. High on the page is high in pitch (left to right), or left to right is low to high (top to bottom). All notes stay inside G major.
- zigzagsA wiggling line flutters up and down with its own shape. A straight line holds a single note.
- thick or thinHeavy, dark strokes sound on the organ. Thin lines strike the glockenspiel.
- scribblesDense areas play a shimmering cluster. Blank paper is silence.