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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
class:: PV_ConformalMap
summary:: Complex plane attack.
related:: Classes/FFT, Classes/IFFT
categories:: UGens>FFT
Description::
Applies the conformal mapping
code::
z → (z - a) / (1 - za*)
::
to the phase vocoder bins z with a given by the real and imag inputs to
the UGen.
Makes a transformation of the complex plane so the output is full of
phase vocoder artifacts but may be musically fun. Usually keep
code::
|a| < 1
::
but
you can of course try bigger values to make it really noisy.
code::
a = 0
::
should
give back the input mostly unperturbed.
See link::http://mathworld.wolfram.com/ConformalMapping.html:: .
classmethods::
method::new
argument::buffer
FFT buffer.
argument::areal
Real part of a.
argument::aimag
Imaginary part of a.
Examples::
code::
// explore the effect
(
SynthDef("conformer2", { |out|
var in, chain, sound;
in = Mix.ar(LFSaw.ar(SinOsc.kr(Array.rand(3,0.1,0.5),0,10,[1,1.1,1.5,1.78,2.45,6.7]*220),0,0.3));
chain = FFT(LocalBuf(2048), in);
chain = PV_ConformalMap(chain, MouseX.kr(0.01,2.0, 'exponential'), MouseY.kr(0.01,10.0, 'exponential'));
sound = IFFT(chain);
Out.ar(out, Pan2.ar(CombN.ar(sound, 0.1, 0.1, 10, 0.5, sound), 0, 0.3));
}).add;
)
a = Synth("conformer2")
a.free
// sound input: use headphones to prevent feedback
(
SynthDef("conformer1", { |out|
var in, chain;
in = SoundIn.ar(0, 0.5);
chain = FFT(LocalBuf(1024), in);
chain = PV_ConformalMap(chain, MouseX.kr(-1.0,1.0), MouseY.kr(-1.0,1.0));
Out.ar(out, Pan2.ar(IFFT(chain), 0));
}).add;
)
a = Synth("conformer1")
a.free
::
|
