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268 lines
5.1 KiB
JavaScript
268 lines
5.1 KiB
JavaScript
var carrier; // this is the carrierillator we will hear
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var modulator; // this carrierillator will modulate the amplitude of the carrier
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var fft; // we'll visualize the waveform
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var opac;
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var carrier;
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function getRandomArbitrary(min, max) {
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return Math.random() * (max - min) + min;
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}
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function setup() {
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createCanvas(innerWidth,innerHeight);
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noFill();
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//SETING FIRST OSCILLATOR: CARRIER
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// EXPLANATION FROM WEBSITE: The carrier is typically set at an audible frequency (i.e. 440 Hz) and connected to master output by default. The carrier.amp is set to zero because we will have the modulator control its amplitude.
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var randomnumb = getRandomArbitrary(0, 20);
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console.log(randomnumb);
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carrier = new p5.Oscillator(); // connects to master output by default
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carrier.freq(200 + randomnumb); // it sets the frequency of the carrier. AN AUDIBLE ONE.
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carrier.amp(1);
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// carrier's amp is 0 by default, giving our modulator total control
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carrier.start();
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// create an fft to analyze the audio
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//an FFT (fast Fourier transform) converts a signal from its original domain (often time or space) to a representation in the frequency domain and vice versa
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fft = new p5.FFT();
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}
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function draw() {
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//depen de la alçada, la nota TOCADA se sent mes for o menys (volum = amplitud)
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if(mouseY <= height/2) {
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var ampli = map(mouseY, 0, height, 0.01, 2.02);
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}else{
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var ampli = map(mouseY, height, 0, 0.01, 2.02);
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}
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// change carrierillator frequency based on mouseX
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var modFreq = 0.1;
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// si el mouseY és igual o el mateix que la meitat de l'altura, fes aixo. ((DEFINEIX LA AMPLITUD.))
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if(mouseY <= height/2) {
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var modAmp = map(mouseY, 0, height, 0.01, 2.02);
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}else{
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var modAmp = map(mouseY, height, 0, 0.01, 2.02);
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}
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carrier.amp(modAmp, 0.01); // fade time of 0.1 for smooth fading
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// analyze the waveform
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waveform = fft.waveform();
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// drawText(modFreq, modAmp);
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if (mouseIsPressed || (touches && touches.length)){
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opac = 100;
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var mx = mouseX || (touches[0] && touches[0][0]);
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if (mx > 0 && mx < width/20 ){
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carrier.freq(220.0);
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carrier.amp(ampli);
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}else if ( mx > width/20 && mx < 2*(width/20)){
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carrier.freq(233.08);
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carrier.amp(ampli);
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}else if (mx > 2*(width/20) && mx < 3*(width/20)){
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carrier.freq(246.94);
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carrier.amp(ampli);
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}else if (mx > 3*(width/20) && mx < 4*(width/20)){
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carrier.freq(261.63);
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carrier.amp(ampli);
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}else if (mx > 4*(width/20) && mx < 5*(width/20)){
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carrier.freq(277.18);
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carrier.amp(ampli);
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}else if (mx > 5*(width/20) && mx < 6*(width/20)){
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carrier.freq(293.66);
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carrier.amp(ampli);
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}else if (mx > 6*(width/20) && mx < 7*(width/20)){
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carrier.freq(311.13);
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carrier.amp(ampli);
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}else if (mx > 7*(width/20) && mx < 8*(width/20)){
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carrier.freq(329.63);
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carrier.amp(ampli);
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}else if (mx > 8*(width/20) && mx < 9*(width/20)){
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carrier.freq(349.23);
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carrier.amp(ampli);
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}else if (mx > 9*(width/20) && mx < 10*(width/20)){
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carrier.freq(369.99);
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carrier.amp(ampli);
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}else if (mx > 10*(width/20) && mx < 11*(width/20)){
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carrier.freq(392.0);
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carrier.amp(ampli);
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}else if (mx > 11*(width/20) && mx < 12*(width/20)){
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carrier.freq(415.3);
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carrier.amp(ampli);
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}else if (mx > 12*(width/20) && mx < 13*(width/20)){
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carrier.freq(440.0);
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carrier.amp(ampli);
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}else if (mx > 13*(width/20) && mx < 14*(width/20)){
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carrier.freq(466.16);
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carrier.amp(ampli);
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}else if (mx > 14*(width/20) && mx < 15*(width/20)){
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carrier.freq(493.88);
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carrier.amp(ampli);
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}else if (mx > 15*(width/20) && mx < 16*(width/20)){
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carrier.freq(523.25);
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carrier.amp(ampli);
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}else if (mx > 16*(width/20) && mx < 17*(width/20)){
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carrier.freq(554.37);
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carrier.amp(ampli);
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}else if (mx > 17*(width/20) && mx < 18*(width/20)){
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carrier.freq(587.33);
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carrier.amp(ampli);
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}else if (mx > 18*(width/20) && mx < 19*(width/20)){
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carrier.freq(622.25);
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carrier.amp(ampli);
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}else if (mx > 19*(width/20) && mx < width){
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carrier.freq(659.26);
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carrier.amp(ampli);
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}
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//draw a new line
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stroke(0,0,0);
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strokeWeight(0.5);
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line(0, height/2,mx, mouseY);
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line(mx, mouseY, width, height/2);
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background(255, 255, 255,100);
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}else{
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// IF MOUSE IS NOT PRESSED
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if(mouseY <= height/2) {
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opac = map(mouseY, 0,height/2, 100, 0);
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}else{
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opac = map(mouseY, height, height/2, 100, 0);
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}
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background(255,255,255,opac); // alpha
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// draw the shape of the waveform
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//drawWaveform();
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}
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}
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function drawWaveform() {
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if(mouseIsPressed){
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stroke(255,255,255);
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strokeWeight(1);
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line(0, height/2,mx, mouseY);
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line(mx, mouseY, width, height/2);
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background(0, 0, 0,100);
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}else{
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stroke(0,0,0,100);
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strokeWeight(0.5);
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beginShape();
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for (var i = 0; i<waveform.length; i++){
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var x = map(i, 0, (waveform.length)/8, 0, width);
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var y = map((waveform[i])/8, -1, 1, -height/2, height/2);
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vertex(x, y + height/2);
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}
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endShape();
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}
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}
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