JS1k: The JavaScript code golfing competition

_='
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// original


	//// ALIEN NOISE MACHINE
	//// automorph.net
	
	
	////   c==8
	
	
			
	        A = new AudioContext();
			
			O = [];
			
			
			b.style.background="#031";
		
			G=Math.random;
			R=Math.round;
			
			
			
			
			//generates a note given o=octave, n, note number, Q=variance
			function W(o,n,Q)
			{
				//dorian-like exatonic scale, chose an initial segment according to Q
				var a = [0,3,5,7,9,10,12].slice(0,Q+1);
				//superpower math
				var r = (Math.pow(2,o))*8*Math.pow(Math.pow(2,1/12),3+(30+a[n%a.length]));
				return(r);
			}
			
			//generate a random melodic/rithmic pattern
			// u will be the array of 'notes'
			// v will be array of booleans: note on/off...
			function rp()
			{
				var u=[];
				var v=[];
				var i=0;
				while(i<5+3*G())
				{
					i++;
					u.push(R(G()*7+i*G()*2));
					v.push((G()>0.5));
				}
				return {u:u, v:v};
			}
			
			
			//random tone: only sine and saw provided!....
			function rt()
			{
			 return G()>0.5?"sine":"sawtooth";
			}
			
			
			// fattapposta is a south-italian words that can be translated as 'whacchacallit' or something
			//essentially manages the range inputs on the dom
			function fa()//fattappost
			{
				var c=document.createElement("input");
				c.type="range";
				c.value=0;
				return c;
			}
			
			//choose update time (how often will my note change?)
			function cu(n)
			{
				return 2*(1+(~~G())+(n<1))*(1+(~~G())+(n<2))*(1+(n<3)); 
			}
			
			
			//err... i do not recall that function. randomizes stuff, mainly
			function du(s,n)
			{
				s.d=Math.pow(G(),0.3);
				s.p=rp().u;//[0,2,3,4,8];
				s.r=rp().v;
				s.u=cu(n)
				s.m.type=rt();
			}
			
			function M(n) //the super mega constructor
			{
				var s=this;
				s.m = A.createOscillator();
				s.n=n;
				s.m.frequency.value=W(1,s.n,1);
				s.g=A.createGain();
				s.m.connect(s.g);
				s.g.connect(A.destination);
				s.c = fa();
				s.i=0;
				
				du(s,n);
				
				s.b=document.createElement("button");
				s.w = fa();
				s.b.innerHTML="?";
				s.b.onclick = function()
				{
					du(s);
				}
				
				s.z=0;
				
				s.c.onchange=function()
				{
					s.v=s.c.value/100;
				}
				s.w.onchange=function()
				{
					s.z=s.w.value/10;
				}
				s.v=s.c.value;
				H(s.c);
				H(s.w);
				H(s.b);
				document.write("<br>");
				
				s.g.gain.value=s.c.value/100;
				//alert(this.u);
				
				s.sf = function()
				{
				s.i++;
				s.m.frequency.value=W(s.n,s.p[(s.i)%s.p.length],s.z);
				}
			
				s.up = function()
				{
					s.g.gain.value*=s.d;
				}
			}
			
			//append
			function H(x)
			{
				document.body.appendChild(x);
			}
			
	
			//makes the oscillators...
			for(i=0; i<5; i++)
			{
				O.push(new M(i));
				O[i].m.start(0);
			}
			
			
			var B = 0;
			
			// main loop
			function Z()
			{
				setTimeout(
					function()
					{
						B++;
						for(i=0;i<5;i++)
						{
							O[i].up();
							if(B%O[i].u==0)
							{
								O[i].g.gain.value=(O[i].c.value/100)*(O[i].r[B%(O[i].r.length)])/(1+~~(O[i].m.type[1]=='a')*2);
								O[i].sf();
							}
						}
						Z();
					}
					,
					70
				);
			}
			
			
			Z();
			

			// bring luve and peacy to the warld, you ell.
			// d.p.m

//// 2016 daniele pascal morelli