JS1k: The JavaScript code golfing competition

M=Math;n=String.fromCharCode;N=16;Z=255;O=20;U=62;B=100;S=44100;T=32;s=T*S;D="data";function r(b,e){return e==1?n(b&Z,b>>8&Z):n(b&Z,b>>8&Z,b>>N&Z,b>>24&Z)}k=1.0594;a=0.01;A=[9,11,2,9,11,12,28,9,18,12,1,14,9,12,N,9];z="";for(p=0;p<T;p++){for(t=0;t<S;t++){o=M.floor(0.5+0.5*M.sin(t*a)*65535);z+=n(o&Z,o>>8&Z)}a*=k}l=length;c="fmt "+r(N)+r(1,1)+r(1,1)+r(S)+r(2*S)+r(2,1)+r(N,1);d=D+r(s*2)+z;h="RIFF"+r(4+(8+c.l)+(8+d.l))+"WAVE";a=new Audio(D+":audio/wav;base64,"+escape(btoa(h+c+d)));V=document.getElementById("c"); c=V.getContext("2d");c.f=c.fillRect;H=V.height=160;W=V.width=510;function f(b,e,g){c.fillStyle="rgb("+b+","+e+","+g+")"}V.onmousedown=function(b){x=b.clientX-5;y=b.clientY-5;X=O;for(j=0;j<N;j++){if(x>X&&x<X+O)A[j]+=y>40&&y<U?1:y>U&&y<82?-1:0;X+=30}};t=0;setInterval(function(){f(B,B,B);c.f(0,0,W,H);t=++t%N;a.pause();a.currentTime=A[t];a.play();for(j=0;j<N;j++){o=O+A[j]*N;x=O+j*30;f((j==t)*H,o,o);c.f(x,40,O,O);c.f(x,U,O,O);c.fillText(A[j],x,B)}},H);

TT1NYXRoO249U3RyaW5nLmZyb21DaGFyQ29kZTtOPTE2O1o9MjU1O089MjA7VT02MjtCPTEwMDtTPTQ0MTAwO1Q9MzI7cz1UKlM7RD0iZGF0YSI7ZnVuY3Rpb24gcihiLGUpe3JldHVybiBlPT0xP24oYiZaLGI+PjgmWik6bihiJlosYj4+OCZaLGI+Pk4mWixiPj4yNCZaKX1rPTEuMDU5NDthPTAuMDE7QT1bOSwxMSwyLDksMTEsMTIsMjgsOSwxOCwxMiwxLDE0LDksMTIsTiw5XTt6PSIiO2ZvcihwPTA7cDxUO3ArKyl7Zm9yKHQ9MDt0PFM7dCsrKXtvPU0uZmxvb3IoMC41KzAuNSpNLnNpbih0KmEpKjY1NTM1KTt6Kz1uKG8mWixvPj44JlopfWEqPWt9bD1sZW5ndGg7Yz0iZm10ICIrcihOKStyKDEsMSkrcigxLDEpK3IoUykrcigyKlMpK3IoMiwxKStyKE4sMSk7ZD1EK3IocyoyKSt6O2g9IlJJRkYiK3IoNCsoOCtjLmwpKyg4K2QubCkpKyJXQVZFIjthPW5ldyBBdWRpbyhEKyI6YXVkaW8vd2F2O2Jhc2U2NCwiK2VzY2FwZShidG9hKGgrYytkKSkpO1Y9ZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoImMiKTsgYz1WLmdldENvbnRleHQoIjJkIik7Yy5mPWMuZmlsbFJlY3Q7SD1WLmhlaWdodD0xNjA7Vz1WLndpZHRoPTUxMDtmdW5jdGlvbiBmKGIsZSxnKXtjLmZpbGxTdHlsZT0icmdiKCIrYisiLCIrZSsiLCIrZysiKSJ9Vi5vbm1vdXNlZG93bj1mdW5jdGlvbihiKXt4PWIuY2xpZW50WC01O3k9Yi5jbGllbnRZLTU7WD1PO2ZvcihqPTA7ajxOO2orKyl7aWYoeD5YJiZ4PFgrTylBW2pdKz15PjQwJiZ5PFU/MTp5PlUmJnk8ODI/LTE6MDtYKz0zMH19O3Q9MDtzZXRJbnRlcnZhbChmdW5jdGlvbigpe2YoQixCLEIpO2MuZigwLDAsVyxIKTt0PSsrdCVOO2EucGF1c2UoKTthLmN1cnJlbnRUaW1lPUFbdF07YS5wbGF5KCk7Zm9yKGo9MDtqPE47aisrKXtvPU8rQVtqXSpOO3g9TytqKjMwO2YoKGo9PXQpKkgsbyxvKTtjLmYoeCw0MCxPLE8pO2MuZih4LFUsTyxPKTtjLmZpbGxUZXh0KEFbal0seCxCKX19LEgpOw==

M=Math;
			n=String.fromCharCode;
			N=16;
			Z=255;
			O=20;
			U=62;
			B=100;
			S=44100;
			T=32;
			s=T*S; // 32 1-second tones.
			D="data";
			//
			// audio
			//
			function r(A,p)
			{
				return p==1?n(A&Z,A>>8&Z):n(A&Z,A>>8&Z,A>>N&Z,A>>24&Z)
			}
			k = 1.0594;//63094359;	// 12th root of 2
			a = 0.01; //0.006875*k*k*k;	// a

			A=[9,11,2,9,11,12,28,9,18,12,1,14,9,12,N,9]; // preset melody
			z="";
			for(p=0;p<T;p++)
			{
				for(t=0;t<S;t++)
					o= M.floor( 0.5 + 0.5 * M.sin(t*a) * 0xffff ),
					z+=n(o&Z,o>>8&Z);					
				a *= k;
			}
			l=length;
			c="fmt "+r(N)+r(1,1)+r(1,1)+r(S)+r(2*S)+r(2,1)+r(N,1);
			d=  D   +r(s*2)+z;
			h="RIFF"+r(4+(8+c.l)+(8+d.l))+"WAVE";
			
			a=new Audio( D + ":audio/wav;base64," + escape(btoa(h+c+d)) );
			
			//
			// graphix:
			//
			V = document.getElementById('c');  
			c = V.getContext('2d');  			
			c.f = c.fillRect;  
			H=V.height=160;
			W=V.width=510;
			function f(r,g,b)
			{
				c.fillStyle = "rgb("+r+","+g+","+b+")"
			}
			
			V.onmousedown=function(m)
			{
				x=m.clientX-5;
				y=m.clientY-5;
				X=O;
				for ( j=0; j<N; j++ ) // clicked?
				{
					if ( x>X && x<X+O )
						A[j] += y>40&&y<U ? 1 : y>U&&y<82 ? -1 : 0;
					X += 30;
				}
			}

			//
			// frame
			//
			t=0;
			setInterval(function() 
			{
				f(B,B,B);  
				c.f(0, 0, W,H);  
				t = (++t % N);
				a.pause();
				a.currentTime=A[t];
				a.play();
				for ( j=0; j<N; j++ )
				{
					o=O + A[j]*N;
					x=O+j*30;
					f((j==t)*H,o,o);  
					c.f( x, 40, O, O);
					c.f( x, U, O, O);
					c.fillText( A[j] , x, B )
				}
			},H);