1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
class:: LeastChange
summary:: Output least changed
related:: Classes/MostChange, Classes/LastValue
categories:: UGens>Maths
Description::
Given two inputs code::a:: and code::b::, let code::da[t] = abs(a[t] - a[t - 1]):: and code::db[t] = abs(b[t] - b[t - 1])::. Output code::a[t]:: if code::da[t]:: is smaller, and output code::b[t]:: if code::db[t]:: is smaller. If code::da[t] == db[t]::, use whichever input was used last (assume code::a:: for the first sample of output).
classmethods::
method::ar, kr
argument::a
Input signal A.
argument::b
Input signal B.
examples::
code::
(
d = { arg amp=1.0;
var in1, in2;
in1 = LFNoise0.ar(800, amp);
in2 = SinOsc.ar(800);
LeastChange.ar(in1, in2) * 0.1;
}.play;
)
d.set(\amp, 0.1);
d.set(\amp, 0);
d.set(\amp, 3);
d.free;
::
the control that changed least is used as output:
code::
(
d = { arg freq=440;
var internalFreq;
internalFreq = LFNoise0.ar(0.3, 300, 800);
SinOsc.ar(
LeastChange.kr(freq, internalFreq) // two sources of change: one external, one internal
) * 0.1
}.play
);
d.set(\freq, 800);
d.set(\freq, 900);
d.free;
::
|
