Sound: To Polygon...

Sound: To Polygon...

A command that creates a Polygon from a selected Sound, where the Polygon's points are defined by the (time, amplitude) pairs of the sound.

Channel: defines which channel of the sound is used.
Time range (s): defines the part of the sound whose (time, amplitude) pairs have to be included.
Vertical range: defines the vertical limits, larger amplitudes will be clipped.
Connection y-value: defines the y-value of the first and last point of the Polygon. This gives the opportunity to draw a closed Polygon with the horizontal connection line at any position you like.

The following script paints the area under a sound curve in red and the area above in green.


s = do ("Create Sound from formula...", "s", "Mono", 0, 1, 10000, "0.5*sin(2*pi*5*x)")


#Connection y-value is at amplitude -1: area under the curve.


p1 = do ("To Polygon...", 1, 0, 0, -1, 1, -1)


do ("Paint...", "{1,0,0}", 0, 0, -1, 1)


selectObject (s)


#Connection y-value is now at amplitude 1: area above the curve.


p2 = do ("To Polygon...", 1, 0, 0, -1, 1, 1)


do ("Paint...", "{0,1,0}", 0, 0, -1, 1)