InRect detects if a two channel signal is within a rectangular region

InRect.ar(x, y, rect)

InRect.kr(x, y, rect)

A pair of mono input signals x and y are treated as a point (x,y) in 2-D; if they fall within the bounds of the rectangle, then this UGen outputs a one; else it outputs zero.

x - X component signal

y - Y component signal

rect - A Rect which defines the rectangular region to monitor; note that Rects are in screen co-ordinates, so the top is smaller than the bottom. The Rect is created once and cannot be modulated

//we'll hear the sawtooth wave when the two sine oscillators are both in the region x = 0.0 to 0.5, y = 0.5 to 1.0

{InRect.ar(SinOsc.ar(1),SinOsc.ar(1.3),Rect(0,0.5,0.5,0.5))*LFSaw.ar(44,0,0.1) }.play

//stereo effect

{(InRect.ar(LFNoise0.ar([140,141]),LFNoise0.ar(143),Rect(0,0,0.5,1)).lag(0.1))*LFSaw.ar(SinOsc.ar(10,0,5,400),0,0.1) }.play

//for the Rect, create as left, 'top', width, height;

r= Rect(0,0,1,1)

r.left

r.right

r.top

r.bottom