Random Frequency Oscillator

Generate a sine wave whose frequency changes to a random value between 30 and 1000 Hz every 100 milliseconds for an infinte time.

Stride

signal FrequencyValue { rate: 10. }
Random ( minimum: 30. maximum: 1000. ) >> FrequencyValue;
Oscillator ( type: 'Sine' frequency: FrequencyValue ) >> AudioOut;

Chuck

SinOsc s => dac;

while( true ) {
    100::ms => now;
    Std.rand2f(30.0, 1000.0) => s.freq;
}

Gibber

Sine().frequency.seq(Rndf(30, 1000), ms(100))

cSound

<CsoundSynthesizer>
<CsOptions>
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 128
nchnls = 2
0dbfs = 1.0

turnon 1

instr 1
kRand randh 970, 10, 10
aout oscili 0.5, 30+ kRand, 1
outs aout, aout
endin

</CsInstruments>
<CsScore>

f 1 0 16384 10 1

e 3600

</CsScore>
</CsoundSynthesizer>

SuperCollider

{
var freq = LFNoise0.kr(10,970,30);
SinOsc.ar([freq,freq],0,0.25,0);
}.play;

SynthDef(\sinewave, { |freq = 440|
        var output = SinOsc.ar(freq, 0 ,0.1);
        Out.ar([1,0], output);
}).send;

r = Routine({
    var delta;
        x = Synth(\sinewave);
    loop {
        delta = 0.100;
        x.set(\freq, rrand(30,1000));
        delta.yield;
    }
});

TempoClock.default.sched(0, r);

r.stop;
x.free;

Gamma

#include <stdio.h>
#include "Gamma/Gamma.h"
#include "Gamma/AudioIO.h"
#include "Gamma/Oscillator.h"

using namespace gam;

Accum<> tmr(10.0);
Sine<> osc(440.0);

void audioCB(AudioIOData& io){
        while(io()){
                if(tmr()){
                        osc.freq(rnd::uni(1.f) * 970 + 30);
                }
                io.out(0) = io.out(1) = osc();
        }
}

int main(int argc, char* argv[]){
        AudioIO io(4096, 44100, audioCB, NULL, 2);
        Sync::master().spu(io.framesPerSecond());
        io.start();
        printf("Press 'enter' to quit...\n"); getchar();
        return 0;
}