LPZ2

three point average filter UGen. Implements the formula :

out(i) = 0.25 * (in(i) + 2 * in(i-1) + in(i-2))

===Examples===

// engage with mouse button
play {
 val sig = WhiteNoise.ar(0.5)
 val flt = LPZ2.ar(sig)
 LinXFade2.ar(sig, flt, MouseButton.kr(-1, 1))
}