//
// You can find the Dittytoy API Reference here: https://Dittytoy.net/syntax
// Example ditties can be found here: https://dittytoy.net/user/Dittytoy
//
// Most of your ditty will run 44100 times per second using javascript in the browser.
// Make sure you optimize your ditty to work well on as many devices as possible. To do that, try to limit
// the number of simultaneously active synths: make sure they don't last longer than necessary, or you can
// hear them, and spread them over different loops (each loop runs in a separate worker).
//

ditty.bpm = 120;
const sin = Math.sin;
const TAU = 2*Math.PI;

input.note = 50; // min=1, max=100, step=0.5
input.iom = 1; // min=1, max=100, step=0.1
input.mul = 1; // min=1, max=100, step=0.1

const MetallicFM = synth.def( class {
    constructor (options) {
        this.t = Math.random();
        this.iom = input.iom; // options.iom || 65.51;
        this.mul = input.mul; // options.mul || 3.8;
    }
    process(note, env, tick, options) {
        // forward time
        this.t += ditty.dt;
    
        // carrier frequency
        const fc = midi_to_hz(note);
        // modulator frequency
        const fm = fc * this.mul;
        const mod = sin(TAU*this.t*fm);
        const osc = sin(TAU*this.t*fc + this.iom*mod) * env.value;
        debug.probe( "osc", osc, 1 );

        return [osc, osc]; // left, right
    }
}); 

loop( () => {
    MetallicFM.play(input.note, { 
        iom: 31.1457,
        mul: 37,
        attack: 0.01, decay: 0.5, sustain: 0, release: 0,  duration: 0.5, amp: 0.5
        
    });
    sleep( 1 );
}, { name: 'MetallicFM' });