// #03 Define Synths. DittyToy 2022.
// The MIT License.
//
// https://dittytoy.net/ditty/e23c3c9952
//
// The first building block for creating generative music on Dittytoy is the synthesizer. The synthesizer is a 
// function (or class) that generates a sound. 
//
// Simple synth definition: use synth.def to create a synth based on a lambda function.
// 
// arguments: phase, env(elope) object (with a duration and a value property), tick and options
// return:    you can return a mono value (-1 to 1), or a stereo signal [l, r] - array
//
// second argument of synth.def are the default options of the synth (you can override these options when you call synth.play)
//
// https://dittytoy.net/syntax#synthesizers
//

const noise  = synth.def( (phase, env, tick, options) => (Math.random() * 2 - 1) * env.value );
const kick   = synth.def( (phase, env, tick, options) => Math.sin(phase * 2 * Math.PI * (1.5 - tick * 4)) * env.value, { attack: 0.0125, release: 0.075 });

loop( (loopCount) => {
    
    kick.play(c3);
    sleep(1);
    
}, { name: 'kick' });

loop( (loopCount) => {
    
     noise.play(c3, { attack: 0.0125, release: 0.075, amp: .05 + Math.random() * 0.05 });
     sleep(0.25);
     
}, { name: 'hi-hat' });

loop( (loopCount) => {

    for (let i=0; i<4; i++) {
        sine.play(c4, { attack: 0.01, release: 0.25,  duration: 0.125, pan: Math.random() * 2 - 1, amp: 1.0 });
        sleep( 0.25 );
    }

    sine.play(d4, { attack: 0.01, release: 0.25,  duration: 0.25 }); // attack and release in seconds, duration in ticks
    sleep(0.5); // sleep in ticks

    sine.play(f4, { attack: 0.01, release: 0.75,  duration: 0.25 });
    sleep(0.5);

}, { name: 'melody' });