class:: LFDNoise1
summary:: Dynamic ramp noise
related:: Classes/LFClipNoise, Classes/LFDClipNoise, Classes/LFDNoise0, Classes/LFDNoise3, Classes/LFNoise0, Classes/LFNoise1, Classes/LFNoise2
categories::  UGens>Generators>Stochastic


Description::

Like  link::Classes/LFNoise1:: , it generates linearly interpolated
random values at a rate given by the  code::freq::
argument, with two differences:
list::
## no time quantization
## fast recovery from low freq values footnote::
link::Classes/LFNoise0:: ,  link::Classes/LFNoise1::  and
link::Classes/LFNoise2::  quantize to the nearest integer division
of the samplerate, and they poll the  code::freq::
argument only when scheduled; thus they often seem to hang
when freqs get very low.
::
::

If you don't need very high or very low freqs, or use fixed freqs,
link::Classes/LFNoise1::  is more efficient.


classmethods::

method::ar, kr

argument::freq
Approximate rate at which to generate random values.

argument::mul
Output will be multiplied by this value.

argument::add
This value will be added to the output.

Examples::

code::
// try wiggling mouse quickly;
// LFNoise frequently seems stuck, LFDNoise changes smoothly.

{  SinOsc.ar(LFNoise1.ar(MouseX.kr(0.1, 1000, 1), 200, 500), 0, 0.2)  }.play

{  SinOsc.ar(LFDNoise1.ar(MouseX.kr(0.1, 1000, 1), 200, 500), 0, 0.2)  }.play


// LFNoise quantizes time steps at high freqs, LFDNoise does not:

{ LFNoise1.ar(XLine.kr(2000, 20000, 8), 0.1) }.scope;

{ LFDNoise1.ar(XLine.kr(2000, 20000, 8), 0.1) }.scope;
::