Pmeanrand random values that tend toward ((lo + hi) / 2) 

superclass: Pattern

Pmeanrand(lo, hi, length)

lo, hi lower and upper boundary of values (default: 0.0 and 1.0)

length number of values produced  (default: inf)

// example

(

var a, c, w;

a = Pmeanrand(0.0, 1.0, inf);

c = a.asStream.nextN(500);

w = Window.new("Pmeanrand", Rect(10, 10, 540, 800));

// plot the values

c.plot(bounds: Rect(10, 10, 520, 380), discrete: true, parent: w);

// a histogram of the values

c.histo(500).plot(bounds: Rect(10, 410, 520, 380), parent: w);)

// sound example

(

SynthDef(\help_sinegrain, 

{ arg out=0, freq=440, sustain=0.05;

var env;

env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction:2);

Out.ar(out, SinOsc.ar(freq, 0, env))

}).add;

)

(

var a;

a = Pmeanrand(0.0, 1.0, inf).asStream;

{

loop {

Synth(\help_sinegrain, [\freq, a.next * 600 + 300]);

0.02.wait;

}

}.fork;

)

// this is equivalent to:

(

{

loop {

Synth(\help_sinegrain, [\freq, (rrand(0.0, 1.0) + rrand(0.0, 1.0) * 0.5) * 600 + 300]);

0.02.wait;

}

}.fork;

)