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class:: Index
summary:: Index into a table with a signal
related:: Classes/WrapIndex, Classes/Shaper
categories:: UGens>Buffer
Description::
Index into a table with a signal.
The input signal value is truncated to an integer value and used as an
index into the table. Out-of-range index values are clipped 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 fixed table
(
{
SinOsc.ar(
Index.kr(
LocalBuf.newFrom([ 200, 300, 400, 500, 600, 800 ]),
LFSaw.kr(2.0).range(0, 7)
),
0,
0.5
)
}.play;
)
// with mouse control
(
{
SinOsc.ar(
Index.kr(
LocalBuf.newFrom([ 200, 300, 400, 500, 600, 800 ]),
MouseX.kr(0, 7)
),
0,
0.5
)
}.play;
)
(
// indexing into a changeable table
s = Server.local;
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(
Index.kr(
bufnum,
LFSaw.kr(2).range(0, 7)
),
0,
0.5
)
)
}).play(s, [\bufnum, b]);
)
b.setn(*[200, 300, 400, 500, 600, 800].scramble.postln - 30);
(
SynthDef(\help_Index, { |out=0, bufnum=0|
Out.ar(out,
SinOsc.ar(
Index.kr(
bufnum,
MouseX.kr(0, BufFrames.ir(i_bufnum))
),
0,
0.5
)
)
}).play(s, [\bufnum, b]);
)
b.free;
::
|
