let ArrSiz = 12288;

let echoArray = Array(ArrSiz).fill(0);

synth.def( class {
    
    constructor (options) {
        this.phase = 0;
        this.et = 0;
        this.randomTranspose = Math.random()*7|0;
    }
    
    process(note, env, tick, options) {
        this.et++;
        
        this.phase += ditty.dt * 48e3;
        let n = this.phase / 48e3 * Math.PI * 2 * 440 * 2 ** ([0,7,3,5,-3,0,3,-2][this.phase/32768&7]/12);
        const wave = Math.sin( n + Math.sin(n*7+Math.sin(n*2)) +Math.sin(n/512)*4)*.1**(this.phase/32768%1);
        
        echoArray[this.et%ArrSiz|0] = wave + echoArray[(this.et*2**(this.randomTranspose/12))%ArrSiz|0]/1.1;
        
        let out = echoArray[this.et%ArrSiz|0];
        
        return [(out-wave)/2+wave, (out-wave)/3+wave]; // left, right
    }
    
}).play(0, { env: one} );