BufRd buffer reading oscillator

read the content of a buffer at an index. 

see also BufWr

BufRd.ar(numChannels, bufnum, phase, loop, interpolation)

numChannels number of channels that the buffer will be.

this must be a fixed integer. The architecture of the SynthDef

cannot change after it is compiled.

warning: if you supply a bufnum of a buffer that has a different

numChannels then you have specified to the BufRd, it will

fail silently.

bufnum the index of the buffer to use

phase   audio rate modulatable index into the buffer. Warning: The phase argument only offers precision for addressing 2**24 samples (about 6.3 minutes at 44100Hz).

loop      1 means true, 0 means false.  this is modulatable.

interpolation    1 means no interpolation, 2 is linear, 4 is cubic interpolation

in comparison to PlayBuf:

PlayBuf plays through the buffer by itself,

BufRd only moves its read point by the phase input

and therefore has no pitch input

BufRd has variable interpolation

(

// read a whole sound into memory

s = Server.local;

// note: not *that* columbia, the first one

s.waitForBoot{

s.sendMsg("/b_allocRead", 0, "sounds/a11wlk01.wav");

}

)

//use any AUDIO rate ugen as an index generator

{ BufRd.ar(1, 0, SinOsc.ar(0.1) * BufFrames.ir(0)) }.play;

{ BufRd.ar(1, 0, LFNoise1.ar(1) * BufFrames.ir(0)) }.play;

{ BufRd.ar(1, 0, LFNoise1.ar(10) * BufFrames.ir(0)) }.play;

{ BufRd.ar(1, 0, LFTri.ar(0.1) + LFTri.ar(0.23) * BufFrames.ir(0)) }.play;

// original duration

{ BufRd.ar(1, 0, LFSaw.ar(BufDur.ir(0).reciprocal).range(0, BufFrames.ir(0)) ) }.play;

//use a phasor index into the file

{ BufRd.ar(1, 0, Phasor.ar(0, BufRateScale.kr(0), 0, BufFrames.kr(0))) }.play;

//change rate and interpolation

(

x = { arg rate=1, inter=2; 

BufRd.ar(1, 0, Phasor.ar(0, BufRateScale.kr(0) * rate, 0, BufFrames.kr(0)), 1, inter) 

}.play;

)

x.set(\rate, 0.9);

x.set(\rate, 0.6);

x.set(\inter, 1);

x.set(\inter, 0);

//write into the buffer with a BufWr

(

y = { arg rate=1; 

var in;

in = SinOsc.ar(LFNoise1.kr(2, 300, 400), 0, 0.1);

BufWr.ar(in, 0, Phasor.ar(0, BufRateScale.kr(0) * rate, 0, BufFrames.kr(0)));

0.0 //quiet

}.play;

)

//read it with a BufRd

(

x = { arg rate=1; 

BufRd.ar(1, 0, Phasor.ar(0, BufRateScale.kr(0) * rate, 0, BufFrames.kr(0))) 

}.play;

)

x.set(\rate, 5);

y.set(\rate, 2.0.rand);

x.set(\rate, 2);