250 byte "music" "video" in pure HTML5 + JS: https://zyan.scripts.mit.edu/small.html
visual from http://www.p01.org/128b_raytraced_checkboard/
another js bytebeat:
c=new AudioContext;n=setInterval("n+=4.2;j=k/n;o=c.createOscillator();o.frequency.value=880*Math.cos(j-n);o.connect(c.destination);o.start();o.stop(n/k)",k=64)
@bcrypt this makes me wonder how large the python in isis' pinned tweet would be as javascript instead
this one sounds like a surround sound test:
setInterval('c=new AudioContext;n=setInterval("for(n+=7,i=k;i-=1/k;1)j=k/i;o=c.createOscillator();o.frequency.value=176*(j+n/k^j)*(1-0.02*Math.random());o.connect(c.destination);o.start();o.stop(n/k)",k=64)', 2048)
@bcrypt that is so incredibly cool and all of the code fits in this toot:
<pre id=p><script>c=new AudioContext;n=setInterval("for(n+=7,i=k,P='p.\\n';i-=1/k;P+=P[i%2?(i%2*j-j+n/k^j)&1:2])j=k/i;p.innerHTML=P;o=c.createOscillator();o.frequency.value=200*(j+n/k^j);o.connect(c.destination);o.start();o.stop(n/k)",k=64)</script>