Playing for a specific time

[RossComputerGuy]

I am wondering if there is a way to have a sound be generated for a specific amount of time.
Example: I could have the program oscillate a sound for 5 minutes or 6 days.
This is for a virtual machine that I'm building.
My code:

const createOscillator = require("audio-oscillator");
const createSpeaker = require("audio-speaker");
const IO = require(__dirname+"/../../io");
const OSCILLATOR_TYPES = [
	"sine","sin",
	"cosine","cos",
	"saw","sawtooth",
	"tri","triangle",
	"rect","rectangle","quad","square",
	"delta","pulse",
	"series","fourier","harmonics","periodic",
	"clausen",
	"step",
	"interpolate",
	"noise"
];
const Speaker = require("audio-speaker/pull");

function Audio(vm) {
	this.vm = vm;
	this.buffer = [];

	this.oscillator = {};
	this.oscillator.type = "sine";
	this.oscillator.frequency = 440;
	this.oscillator.detune = 0;
	this.oscillator.sampleRate = 44100;
	this.oscillator.channels = 1;
	this.oscillator.dtype = "array";
	this.oscillator.phase = 0;

	this.vm.io.ports[0xA2] = new IO(0xA2,this.vm);
	this.vm.io.ports[0xA3] = new IO(0xA3,this.vm);

	this.vm.io.ports[0xA2].on("write16",(value) => {
		switch(value) {
			case 0:
				this.buffer = [];
				break;
			case 12:
				process.nextTick(() => {
					var oscillator = createOscillator(this.oscillator);
					console.log(createSpeaker(oscillator));
				});
				break;
			default:
				this.vm.io.ports[0xA2].value = value;
				break;
		}
	});
	this.vm.io.ports[0xA3].on("write16",(value) => {
		switch(this.vm.io.ports[0xA2].value) {
			case 1:
				this.buffer.push(value);
				break;
			case 2:
				this.buffer.splice(value,1);
				break;
			case 3:
				this.oscillator.type = OSCILLATOR_TYPES[value];
				switch(this.oscillator.type) {
					case "sine":
					case "sin":
						this.oscillator.phase = 0;
						break;
					case "cosine":
					case "cos":
						this.oscillator.phase = 0;
						break;
					case "saw":
					case "sawtooth":
						this.oscillator.inversed = false;
						break;
					case "tri":
					case "triangle":
						this.oscillator.ratio = 0.5;
						break;
					case "rect":
					case "rectangle":
					case "quad":
					case "square":
						this.oscillator.ratio = 0.5;
						break;
					case "series":
					case "fourier":
					case "harmonics":
					case "periodic":
						this.oscillator.real = [0,1];
						this.oscillator.imag = [0,0];
						this.oscillator.normalize = true;
						break;
					case "clausen":
						this.oscillator.limit = 10;
						break;
					case "step":
						this.oscillator.samples = [];
						break;
					case "interpolate":
						this.oscillator.samples = [];
						break;
				}
				break;
			case 4:
				this.oscillator.frequency = value;
				break;
			case 5:
				this.oscillator.detune = value;
				break;
			case 6:
				this.oscillator.sampleRate = value;
				break;
			case 7:
				switch(this.oscillator.type) {
					case "sine":
					case "sin":
						this.oscillator.phase = value;
						break;
					case "cosine":
					case "cos":
						this.oscillator.phase = value;
						break;
					case "saw":
					case "sawtooth":
						this.oscillator.inverted = (value == 1);
						break;
					case "tri":
					case "triangle":
						this.oscillator.ratio = value;
						break;
					case "rect":
					case "rectangle":
					case "quad":
					case "square":
						this.oscillator.ratio = value;
						break;
					case "series":
					case "fourier":
					case "harmonics":
					case "periodic":
						this.oscillator.real[0] = value;
						break;
					case "clausen":
						this.oscillator.limit = value;
						break;
					case "step":
					case "interpolate":
						this.oscillator.samples.push(value);
						break;
				}
				break;
			case 8:
				switch(this.oscillator.type) {
					case "series":
					case "fourier":
					case "harmonics":
					case "periodic":
						this.oscillator.real[1] = value;
						break;
				}
				break;
			case 9:
				switch(this.oscillator.type) {
					case "series":
					case "fourier":
					case "harmonics":
					case "periodic":
						this.oscillator.imag[0] = value;
						break;
				}
				break;
			case 10:
				switch(this.oscillator.type) {
					case "series":
					case "fourier":
					case "harmonics":
					case "periodic":
						this.oscillator.imag[1] = value;
						break;
				}
				break;
			case 11:
				switch(this.oscillator.type) {
					case "series":
					case "fourier":
					case "harmonics":
					case "periodic":
						this.oscillator.normalize = (value == 1);
						break;
				}
				break;
		}
	});
}

module.exports = Audio;

[dy]

@SpaceboyRoss01 simplest way for now is counting generated data - every time you generate a buffer, you require a number of samples, ie.

let n = 1024
let buf = oscillate(n);
count += n;

//if more than 6 days - abort
let sixDays = 44100*6*24*60*60
if (count > sixDays) oscillate(null)

[RossComputerGuy]

but that doesn't play the sound to the speaker

[dy]

Well that was not the question :)
Just output the generated data to the speaker that's it.
I'll try to come up with more elaborate example once audiojs/audio-speaker#44 is released.

[dy]

Not sure what is the issue here. Pls let me know if that is still actual.