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
|
class:: WrapIndex
summary:: Index into a table with a signal.
related:: Classes/Index, Classes/Shaper
categories:: UGens>Buffer
Description::
The input signal value is truncated to an integer value and used as an
index into the table. Out-of-range index values are wrapped cyclically to
the valid range.
classmethods::
method::ar, kr
argument::bufnum
Index of the buffer.
argument::in
The input signal.
argument::mul
Output will be multiplied by this value.
argument::add
This value will be added to the output.
Examples::
code::
// indexing into a table
(
{
var buf = LocalBuf.newFrom([ 200, 300, 400, 500, 600, 800 ]);
var freq = WrapIndex.kr(buf, MouseX.kr(0, BufFrames.ir(buf) * 3));
SinOsc.ar(freq) * 0.1
}.play;
)
// the same using a global buffer
(
t = [ 200, 300, 400, 500, 600, 800 ];
b = Buffer(s, t.size, 1);
// alloc and set the values
s.listSendMsg( b.allocMsg( b.setnMsg(0, t) ).postln );
SynthDef(\help_Index, { |out=0, bufnum=0|
Out.ar(out,
SinOsc.ar(
WrapIndex.kr(
bufnum,
MouseX.kr(0, BufFrames.ir(bufnum) * 3)
),
0,
0.5
)
)
}).play(s, [\bufnum, b.bufnum]);
)
::
|
