Index | SuperCollider 3.13.1 Help

Subclasses: DetectIndex, FoldIndex, IndexInBetween, IndexL, … see all

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.

Class Methods

Index.ar(bufnum, in: 0.0, mul: 1.0, add: 0.0)

Index.kr(bufnum, in: 0.0, mul: 1.0, add: 0.0)

Arguments:

bufnum	Index of the buffer.
in	The input signal.
mul	Output will be multiplied by this value.
add	This value will be added to the output.

Inherited class methods

7 methods from UGen ► show

7 methods from Object ► show

Instance Methods

Inherited instance methods

92 methods from UGen ► show

159 methods from AbstractFunction ► show

260 methods from Object ► show

// 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;

​x
 
// 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 tables = Server.local;t = [ 200, 300, 400, 500, 600, 800 ];b = Buffer(s, t.size, 1);​// alloc and set the valuess.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;

helpfile source: https://github.com/supercollider/supercollider/tree/3.13/HelpSource/Classes/Index.schelp
link::Classes/Index::

Index : PureUGen : UGen : AbstractFunction : Object