HelpSource/Classes/Decay2.schelp

   1 class:: Decay2
   2 summary:: Exponential decay
   3 related:: Classes/Decay
   4 categories::  UGens>Filters>Linear, UGens>Envelopes
   5
   6
   7 Description::
   8 link::Classes/Decay::  has a very sharp attack and can produce clicks.
   9 Decay2 rounds off the attack by subtracting one Decay from another.
  10 code:: Decay2.ar(in, attackTime, decayTime):: is equivalent to:
  11
  12 code::
  13 Decay.ar(in, decayTime) - Decay.ar(in, attackTime)
  14 ::
  15
  16
  17 classmethods::
  18
  19 method::ar, kr
  20
  21 argument::in
  22
  23 The input signal.
  24
  25
  26 argument::attackTime
  27
  28 60 dB attack time in seconds.
  29
  30
  31 argument::decayTime
  32
  33 60 dB decay time in seconds.
  34
  35
  36 argument::mul
  37
  38 argument::add
  39
  40
  41 Examples::
  42
  43 code::
  44 // since attack and decay are a difference of two Decays,
  45 // swapping the values, the envelope turns upside down:
  46 plot({ Decay2.ar(Impulse.ar(1), 0.001, 0.01) })
  47 plot({ Decay2.ar(Impulse.ar(1), 0.01, 0.001) })
  48
  49 // used as an envelope
  50 { Decay2.ar(Impulse.ar(XLine.kr(1,50,20), 0.25), 0.01, 0.2, FSinOsc.ar(600)) }.play;
  51
  52 // compare the above with Decay used as the envelope
  53 { Decay.ar(Impulse.ar(XLine.kr(1,50,20), 0.25), 0.2, FSinOsc.ar(600), 0)  }.play;
  54 ::
  55