mirror of
https://github.com/Tonejs/Tone.js
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764 lines
22 KiB
JavaScript
764 lines
22 KiB
JavaScript
import Envelope from "Tone/component/Envelope";
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import Basic from "helper/Basic";
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import Offline from "helper/Offline";
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import Test from "helper/Test";
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import PassAudio from "helper/PassAudio";
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import APITest from "helper/APITest";
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describe("Envelope", function(){
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Basic(Envelope);
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context("API", function(){
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APITest.constructor(Envelope, {
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"attack" : "Time=",
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"decay" : "Time=",
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"sustain" : "NormalRange=",
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"release" : "Time=",
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"attackCurve" : ["linear", "exponential"],
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"releaseCurve" : ["linear", "exponential"],
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"decayCurve" : ["linear", "exponential"]
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});
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APITest.constructor(Envelope, ["Time=", "Time=", "NormalRange=", "Time="]);
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APITest.method(Envelope, "triggerAttack", ["Time=", "NormalRange="]);
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APITest.method(Envelope, "triggerRelease", ["Time="]);
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});
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context("Envelope", function(){
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it("has an output connections", function(){
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var env = new Envelope();
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env.connect(Test);
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env.dispose();
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});
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it("can get and set values an Objects", function(){
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var env = new Envelope();
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var values = {
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"attack" : 0,
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"decay" : 0.5,
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"sustain" : 1,
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"release" : "4n"
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};
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env.set(values);
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expect(env.get()).to.contain.keys(Object.keys(values));
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env.dispose();
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});
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it("passes no signal before being triggered", function(){
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return Offline(function(){
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new Envelope().toMaster();
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}).then(function(buffer){
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expect(buffer).to.equal.true;
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});
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});
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it("passes signal once triggered", function(){
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return Offline(function(){
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var env = new Envelope().toMaster();
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env.triggerAttack(0.05);
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}).then(function(buffer){
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expect(buffer.getFirstSoundTime()).to.be.closeTo(0.05, 0.001);
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}, 0.1);
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});
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it("can take parameters as both an object and as arguments", function(){
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var env0 = new Envelope({
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"attack" : 0,
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"decay" : 0.5,
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"sustain" : 1
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});
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expect(env0.attack).to.equal(0);
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expect(env0.decay).to.equal(0.5);
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expect(env0.sustain).to.equal(1);
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env0.dispose();
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var env1 = new Envelope(0.1, 0.2, 0.3);
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expect(env1.attack).to.equal(0.1);
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expect(env1.decay).to.equal(0.2);
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expect(env1.sustain).to.equal(0.3);
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env1.dispose();
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});
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it("can set attack to exponential or linear", function(){
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var env = new Envelope(0.01, 0.01, 0.5, 0.3);
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env.attackCurve = "exponential";
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expect(env.attackCurve).to.equal("exponential");
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env.triggerAttack();
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env.dispose();
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//and can be linear
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var env2 = new Envelope(0.01, 0.01, 0.5, 0.3);
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env2.attackCurve = "linear";
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expect(env2.attackCurve).to.equal("linear");
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env2.triggerAttack();
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//and test a non-curve
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expect(function(){
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env2.attackCurve = "other";
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}).to.throw(Error);
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env2.dispose();
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});
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it("can set decay to exponential or linear", function(){
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var env = new Envelope(0.01, 0.01, 0.5, 0.3);
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env.decayCurve = "exponential";
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expect(env.decayCurve).to.equal("exponential");
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env.triggerAttack();
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env.dispose();
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//and can be linear
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var env2 = new Envelope(0.01, 0.01, 0.5, 0.3);
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env2.decayCurve = "linear";
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expect(env2.decayCurve).to.equal("linear");
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env2.triggerAttack();
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//and test a non-curve
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expect(function(){
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env2.decayCurve = "other";
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}).to.throw(Error);
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env2.dispose();
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});
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it("can set release to exponential or linear", function(){
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var env = new Envelope(0.01, 0.01, 0.5, 0.3);
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env.releaseCurve = "exponential";
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expect(env.releaseCurve).to.equal("exponential");
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env.triggerRelease();
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env.dispose();
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//and can be linear
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var env2 = new Envelope(0.01, 0.01, 0.5, 0.3);
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env2.releaseCurve = "linear";
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expect(env2.releaseCurve).to.equal("linear");
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env2.triggerRelease();
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//and test a non-curve
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expect(function(){
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env2.releaseCurve = "other";
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}).to.throw(Error);
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env2.dispose();
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});
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it("correctly schedules an exponential attack", function(){
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var e = {
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attack : 0.01,
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decay : 0.4,
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sustain : 0.5,
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release : 0.1
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};
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.attackCurve = "exponential";
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env.toMaster();
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env.triggerAttack(0);
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}, 0.7).then(function(buffer){
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buffer.forEach(function(sample){
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expect(sample).to.be.within(0, 1);
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}, 0, e.attack);
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buffer.forEach(function(sample){
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expect(sample).to.be.within(e.sustain - 0.001, 1);
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}, e.attack, e.attack + e.decay);
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buffer.forEach(function(sample){
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expect(sample).to.be.closeTo(e.sustain, 0.01);
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}, e.attack + e.decay);
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});
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});
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it("correctly schedules a linear release", function(){
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var e = {
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attack : 0.01,
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decay : 0.4,
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sustain : 0.5,
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release : 0.1
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};
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.attackCurve = "exponential";
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env.toMaster();
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env.triggerAttack(0);
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}, 0.7).then(function(buffer){
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buffer.forEach(function(sample, time){
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var target = 1 - (time - 0.2) * 10;
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expect(sample).to.be.closeTo(target, 0.01);
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}, 0.2, 0.2);
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});
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});
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it("correctly schedules a linear decay", function(){
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var e = {
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attack : 0.1,
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decay : 0.5,
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sustain : 0,
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release : 0.1,
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};
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.decayCurve = "linear";
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env.toMaster();
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env.triggerAttack(0);
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}, 0.7).then(function(buffer){
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expect(buffer.getValueAtTime(0.05)).to.be.closeTo(0.5, 0.01);
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expect(buffer.getValueAtTime(0.1)).to.be.closeTo(1, 0.01);
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expect(buffer.getValueAtTime(0.2)).to.be.closeTo(0.8, 0.01);
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expect(buffer.getValueAtTime(0.3)).to.be.closeTo(0.6, 0.01);
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expect(buffer.getValueAtTime(0.4)).to.be.closeTo(0.4, 0.01);
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expect(buffer.getValueAtTime(0.5)).to.be.closeTo(0.2, 0.01);
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expect(buffer.getValueAtTime(0.6)).to.be.closeTo(0, 0.01);
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});
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});
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it("correctly schedules an exponential decay", function(){
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var e = {
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attack : 0.1,
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decay : 0.5,
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sustain : 0,
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release : 0.1,
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};
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.decayCurve = "exponential";
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env.toMaster();
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env.triggerAttack(0);
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}, 0.7).then(function(buffer){
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expect(buffer.getValueAtTime(0.1)).to.be.closeTo(1, 0.01);
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expect(buffer.getValueAtTime(0.2)).to.be.closeTo(0.27, 0.01);
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expect(buffer.getValueAtTime(0.3)).to.be.closeTo(0.07, 0.01);
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expect(buffer.getValueAtTime(0.4)).to.be.closeTo(0.02, 0.01);
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expect(buffer.getValueAtTime(0.5)).to.be.closeTo(0.005, 0.01);
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expect(buffer.getValueAtTime(0.6)).to.be.closeTo(0, 0.01);
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});
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});
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it("can schedule a very short attack", function(){
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var e = {
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attack : 0.001,
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decay : 0.01,
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sustain : 0.0,
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release : 0.1
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};
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.attackCurve = "exponential";
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env.toMaster();
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env.triggerAttack(0);
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}, 0.2).then(function(buffer){
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buffer.forEach(function(sample){
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expect(sample).to.be.within(0, 1);
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}, 0, e.attack);
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buffer.forEach(function(sample){
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expect(sample).to.be.within(e.sustain - 0.001, 1);
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}, e.attack, e.attack + e.decay);
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buffer.forEach(function(sample){
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expect(sample).to.be.closeTo(e.sustain, 0.01);
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}, e.attack + e.decay);
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});
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});
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it("can schedule an attack of time 0", function(){
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return Offline(function(){
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var env = new Envelope(0, 0.1);
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env.toMaster();
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env.triggerAttack(0.1);
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}, 0.2).then(function(buffer){
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expect(buffer.getValueAtTime(0)).to.be.closeTo(0, 0.001);
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expect(buffer.getValueAtTime(0.0999)).to.be.closeTo(0, 0.001);
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expect(buffer.getValueAtTime(0.1)).to.be.closeTo(1, 0.001);
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});
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});
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it("correctly schedule a release", function(){
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var e = {
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attack : 0.001,
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decay : 0.01,
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sustain : 0.5,
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release : 0.3
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};
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var releaseTime = 0.2;
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.attackCurve = "exponential";
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env.toMaster();
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env.triggerAttackRelease(releaseTime);
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}, 0.6).then(function(buffer){
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var sustainStart = e.attack + e.decay;
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var sustainEnd = sustainStart + releaseTime;
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buffer.forEach(function(sample){
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expect(sample).to.be.below(e.sustain + 0.01);
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}, sustainStart, sustainEnd);
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buffer.forEach(function(sample){
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expect(sample).to.be.closeTo(0, 0.01);
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}, releaseTime + e.release);
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});
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});
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it("is silent before and after triggering", function(){
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var e = {
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attack : 0.001,
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decay : 0.01,
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sustain : 0.5,
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release : 0.3
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};
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var releaseTime = 0.2;
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var attackTime = 0.1;
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.attackCurve = "exponential";
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env.toMaster();
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env.triggerAttack(attackTime);
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env.triggerRelease(releaseTime);
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}, 0.6).then(function(buffer){
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expect(buffer.getValueAtTime(attackTime - 0.001)).to.equal(0);
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expect(buffer.getValueAtTime(e.attack + e.decay + releaseTime + e.release)).to.be.below(0.01);
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});
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});
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it("is silent after decay if sustain is 0", function(){
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var e = {
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attack : 0.01,
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decay : 0.04,
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sustain : 0,
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};
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var attackTime = 0.1;
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain);
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env.toMaster();
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env.triggerAttack(attackTime);
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}, 0.4).then(function(buffer){
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buffer.forEach(function(sample, time){
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expect(buffer.getValueAtTime(attackTime - 0.001)).to.equal(0);
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expect(buffer.getValueAtTime(attackTime + e.attack + e.decay)).to.be.below(0.01);
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});
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});
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});
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it("correctly schedule an attack release envelope", function(){
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var e = {
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attack : 0.08,
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decay : 0.2,
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sustain : 0.1,
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release : 0.2
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};
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var releaseTime = 0.4;
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.toMaster();
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env.triggerAttack(0);
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env.triggerRelease(releaseTime);
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}).then(function(buffer){
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buffer.forEach(function(sample, time){
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if (time < e.attack){
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expect(sample).to.be.within(0, 1);
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} else if (time < e.attack + e.decay){
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expect(sample).to.be.within(e.sustain, 1);
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} else if (time < releaseTime){
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expect(sample).to.be.closeTo(e.sustain, 0.1);
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} else if (time < releaseTime + e.release){
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expect(sample).to.be.within(0, e.sustain + 0.01);
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} else {
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expect(sample).to.be.below(0.0001);
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}
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});
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});
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});
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it("can schedule a combined AttackRelease", function(){
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var e = {
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attack : 0.1,
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decay : 0.2,
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sustain : 0.35,
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release : 0.1
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};
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var releaseTime = 0.4;
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var duration = 0.4;
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.toMaster();
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env.triggerAttack(0);
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env.triggerRelease(releaseTime);
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}, 0.7).then(function(buffer){
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buffer.forEach(function(sample, time){
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if (time < e.attack){
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expect(sample).to.be.within(0, 1);
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} else if (time < e.attack + e.decay){
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expect(sample).to.be.within(e.sustain - 0.001, 1);
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} else if (time < duration){
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expect(sample).to.be.closeTo(e.sustain, 0.1);
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} else if (time < duration + e.release){
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expect(sample).to.be.within(0, e.sustain + 0.01);
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} else {
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expect(sample).to.be.below(0.0015);
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}
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});
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});
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});
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it("can schedule a combined AttackRelease with velocity", function(){
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var e = {
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attack : 0.1,
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decay : 0.2,
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sustain : 0.35,
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release : 0.1
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};
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var releaseTime = 0.4;
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var duration = 0.4;
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var velocity = 0.4;
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.toMaster();
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env.triggerAttack(0, velocity);
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env.triggerRelease(releaseTime);
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}, 0.7).then(function(buffer){
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buffer.forEach(function(sample, time){
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if (time < e.attack){
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expect(sample).to.be.within(0, velocity + 0.01);
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} else if (time < e.attack + e.decay){
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expect(sample).to.be.within(e.sustain * velocity - 0.01, velocity + 0.01);
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} else if (time < duration){
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expect(sample).to.be.closeTo(e.sustain * velocity, 0.1);
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} else if (time < duration + e.release){
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expect(sample).to.be.within(0, e.sustain * velocity + 0.01);
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} else {
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expect(sample).to.be.below(0.01);
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}
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});
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});
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});
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it("can schedule multiple envelopes", function(){
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var e = {
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attack : 0.1,
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decay : 0.2,
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sustain : 0.0,
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release : 0.1
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};
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return Offline(function(){
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var env = new Envelope(e.attack, e.decay, e.sustain, e.release);
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env.toMaster();
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env.triggerAttack(0);
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env.triggerAttack(0.5);
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}, 0.85).then(function(buffer){
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//first trigger
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expect(buffer.getValueAtTime(0)).to.be.closeTo(0, 0.01);
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expect(buffer.getValueAtTime(0.1)).to.be.closeTo(1, 0.01);
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expect(buffer.getValueAtTime(0.3)).to.be.closeTo(0, 0.01);
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//second trigger
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expect(buffer.getValueAtTime(0.5)).to.be.closeTo(0, 0.01);
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expect(buffer.getValueAtTime(0.6)).to.be.closeTo(1, 0.01);
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expect(buffer.getValueAtTime(0.8)).to.be.closeTo(0, 0.01);
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});
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});
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it("can schedule multiple attack/releases with no discontinuities", function(){
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return Offline(function(){
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var env = new Envelope(0.1, 0.2, 0.2, 0.4).toMaster();
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env.triggerAttackRelease(0, 0.4);
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env.triggerAttackRelease(0.4, 0.11);
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env.triggerAttackRelease(0.45, 0.1);
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env.triggerAttackRelease(1.1, 0.09);
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env.triggerAttackRelease(1.5, 0.3);
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env.triggerAttackRelease(1.8, 0.29);
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}, 2).then(function(buffer){
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//test for discontinuities
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var lastSample = 0;
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buffer.forEach(function(sample, time){
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expect(sample).to.be.at.most(1);
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var diff = Math.abs(lastSample - sample);
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expect(diff).to.be.lessThan(0.001);
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lastSample = sample;
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});
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});
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});
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it("can schedule multiple 'linear' attack/releases with no discontinuities", function(){
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return Offline(function(){
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var env = new Envelope(0.1, 0.2, 0.2, 0.4).toMaster();
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env.attackCurve = "linear";
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env.releaseCurve = "linear";
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env.triggerAttackRelease(0, 0.4);
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env.triggerAttackRelease(0.4, 0.11);
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env.triggerAttackRelease(0.45, 0.1);
|
|
env.triggerAttackRelease(1.1, 0.09);
|
|
env.triggerAttackRelease(1.5, 0.3);
|
|
env.triggerAttackRelease(1.8, 0.29);
|
|
}, 2).then(function(buffer){
|
|
//test for discontinuities
|
|
var lastSample = 0;
|
|
buffer.forEach(function(sample, time){
|
|
expect(sample).to.be.at.most(1);
|
|
var diff = Math.abs(lastSample - sample);
|
|
expect(diff).to.be.lessThan(0.001);
|
|
lastSample = sample;
|
|
});
|
|
});
|
|
});
|
|
|
|
it("can schedule multiple 'exponential' attack/releases with no discontinuities", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope(0.1, 0.2, 0.2, 0.4).toMaster();
|
|
env.attackCurve = "exponential";
|
|
env.releaseCurve = "exponential";
|
|
env.triggerAttackRelease(0, 0.4);
|
|
env.triggerAttackRelease(0.4, 0.11);
|
|
env.triggerAttackRelease(0.45, 0.1);
|
|
env.triggerAttackRelease(1.1, 0.09);
|
|
env.triggerAttackRelease(1.5, 0.3);
|
|
env.triggerAttackRelease(1.8, 0.29);
|
|
}, 2).then(function(buffer){
|
|
//test for discontinuities
|
|
var lastSample = 0;
|
|
buffer.forEach(function(sample, time){
|
|
expect(sample).to.be.at.most(1);
|
|
var diff = Math.abs(lastSample - sample);
|
|
expect(diff).to.be.lessThan(0.0035);
|
|
lastSample = sample;
|
|
});
|
|
});
|
|
});
|
|
|
|
it("can schedule multiple 'sine' attack/releases with no discontinuities", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope(0.1, 0.2, 0.2, 0.4).toMaster();
|
|
env.attackCurve = "sine";
|
|
env.releaseCurve = "sine";
|
|
env.triggerAttackRelease(0, 0.4);
|
|
env.triggerAttackRelease(0.4, 0.11);
|
|
env.triggerAttackRelease(0.45, 0.1);
|
|
env.triggerAttackRelease(1.1, 0.09);
|
|
env.triggerAttackRelease(1.5, 0.3);
|
|
env.triggerAttackRelease(1.8, 0.29);
|
|
}, 2).then(function(buffer){
|
|
//test for discontinuities
|
|
var lastSample = 0;
|
|
buffer.forEach(function(sample, time){
|
|
expect(sample).to.be.at.most(1);
|
|
var diff = Math.abs(lastSample - sample);
|
|
expect(diff).to.be.lessThan(0.0035);
|
|
lastSample = sample;
|
|
});
|
|
});
|
|
});
|
|
|
|
it("can schedule multiple 'cosine' attack/releases with no discontinuities", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope(0.1, 0.2, 0.2, 0.4).toMaster();
|
|
env.attackCurve = "cosine";
|
|
env.releaseCurve = "cosine";
|
|
env.triggerAttackRelease(0, 0.4);
|
|
env.triggerAttackRelease(0.4, 0.11);
|
|
env.triggerAttackRelease(0.45, 0.1);
|
|
env.triggerAttackRelease(1.1, 0.09);
|
|
env.triggerAttackRelease(1.5, 0.3);
|
|
env.triggerAttackRelease(1.8, 0.29);
|
|
}, 2).then(function(buffer){
|
|
//test for discontinuities
|
|
var lastSample = 0;
|
|
buffer.forEach(function(sample, time){
|
|
expect(sample).to.be.at.most(1);
|
|
var diff = Math.abs(lastSample - sample);
|
|
expect(diff).to.be.lessThan(0.002);
|
|
lastSample = sample;
|
|
});
|
|
});
|
|
});
|
|
|
|
it("reports its current envelope value (.value)", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope(1, 0.2, 1).toMaster();
|
|
expect(env.value).to.be.closeTo(0, 0.01);
|
|
env.triggerAttack();
|
|
return function(time){
|
|
expect(env.value).to.be.closeTo(time, 0.01);
|
|
};
|
|
}, 0.5);
|
|
});
|
|
|
|
it("can cancel a schedule envelope", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope(0.1, 0.2, 1).toMaster();
|
|
env.triggerAttack(0.2);
|
|
env.cancel(0.2);
|
|
}, 0.3).then(function(buffer){
|
|
expect(buffer.isSilent()).to.be.true;
|
|
});
|
|
});
|
|
});
|
|
|
|
context("Attack/Release Curves", function(){
|
|
|
|
it("can get set all of the types as the attackCurve", function(){
|
|
|
|
var env = new Envelope();
|
|
for (var type in Envelope.Type){
|
|
env.attackCurve = type;
|
|
expect(env.attackCurve).to.equal(type);
|
|
}
|
|
env.dispose();
|
|
});
|
|
|
|
it("can get set all of the types as the releaseCurve", function(){
|
|
var env = new Envelope();
|
|
for (var type in Envelope.Type){
|
|
env.releaseCurve = type;
|
|
expect(env.releaseCurve).to.equal(type);
|
|
}
|
|
env.dispose();
|
|
});
|
|
|
|
it("outputs a signal when the attack/release curves are set to 'bounce'", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : "bounce",
|
|
releaseCurve : "bounce",
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.3, 0.1);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample){
|
|
expect(sample).to.be.above(0);
|
|
}, 0.101, 0.7);
|
|
});
|
|
});
|
|
|
|
it("outputs a signal when the attack/release curves are set to 'ripple'", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : "ripple",
|
|
releaseCurve : "ripple",
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.3, 0.1);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample){
|
|
expect(sample).to.be.above(0);
|
|
}, 0.101, 0.7);
|
|
});
|
|
});
|
|
|
|
it("outputs a signal when the attack/release curves are set to 'sine'", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : "sine",
|
|
releaseCurve : "sine",
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.3, 0.1);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample){
|
|
expect(sample).to.be.above(0);
|
|
}, 0.101, 0.7);
|
|
});
|
|
});
|
|
|
|
it("outputs a signal when the attack/release curves are set to 'cosine'", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : "cosine",
|
|
releaseCurve : "cosine",
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.3, 0.1);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample){
|
|
expect(sample).to.be.above(0);
|
|
}, 0.101, 0.7);
|
|
});
|
|
});
|
|
|
|
it("outputs a signal when the attack/release curves are set to 'step'", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : "step",
|
|
releaseCurve : "step",
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.3, 0.1);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample, time){
|
|
if (time > 0.3 && time < 0.5){
|
|
expect(sample).to.be.above(0);
|
|
} else if (time < 0.1){
|
|
expect(sample).to.equal(0);
|
|
}
|
|
});
|
|
});
|
|
});
|
|
|
|
it("outputs a signal when the attack/release curves are set to an array", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : [0, 1, 0, 1],
|
|
releaseCurve : [1, 0, 1, 0],
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.3, 0.1);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample, time){
|
|
if (time > 0.4 && time < 0.5){
|
|
expect(sample).to.be.above(0);
|
|
} else if (time < 0.1){
|
|
expect(sample).to.equal(0);
|
|
}
|
|
});
|
|
});
|
|
});
|
|
|
|
it("can scale a velocity with a custom curve", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.3,
|
|
sustain : 1,
|
|
release : 0.3,
|
|
decay : 0,
|
|
attackCurve : [0, 1, 0, 1],
|
|
releaseCurve : [1, 0, 1, 0],
|
|
}).toMaster();
|
|
env.triggerAttackRelease(0.4, 0.1, 0.5);
|
|
}, 0.8).then(function(buffer){
|
|
buffer.forEach(function(sample){
|
|
expect(sample).to.be.at.most(0.51);
|
|
});
|
|
});
|
|
});
|
|
|
|
it("can retrigger partial envelope with custom type", function(){
|
|
return Offline(function(){
|
|
var env = new Envelope({
|
|
attack : 0.5,
|
|
sustain : 1,
|
|
release : 0.5,
|
|
decay : 0,
|
|
attackCurve : "cosine",
|
|
releaseCurve : "sine",
|
|
}).toMaster();
|
|
env.triggerAttack(0);
|
|
env.triggerRelease(0.2);
|
|
env.triggerAttack(0.5);
|
|
}, 1).then(function(buffer){
|
|
expect(buffer.getValueAtTime(0)).to.equal(0);
|
|
expect(buffer.getValueAtTime(0.1)).to.be.closeTo(0.32, 0.01);
|
|
expect(buffer.getValueAtTime(0.2)).to.be.closeTo(0.6, 0.01);
|
|
expect(buffer.getValueAtTime(0.3)).to.be.closeTo(0.53, 0.01);
|
|
expect(buffer.getValueAtTime(0.4)).to.be.closeTo(0.38, 0.01);
|
|
expect(buffer.getValueAtTime(0.5)).to.be.closeTo(0.2, 0.01);
|
|
expect(buffer.getValueAtTime(0.6)).to.be.closeTo(0.52, 0.01);
|
|
expect(buffer.getValueAtTime(0.7)).to.be.closeTo(0.78, 0.01);
|
|
expect(buffer.getValueAtTime(0.8)).to.be.closeTo(0.95, 0.01);
|
|
expect(buffer.getValueAtTime(0.9)).to.be.closeTo(1, 0.01);
|
|
});
|
|
});
|
|
});
|
|
});
|
|
|