Bytebeat in browser console

gistfile1.txt

window.bytebeat = async (f, d=0.2) => {
    if (!f) return window.ctx?.close().then(() => { delete window.ctx; delete window.bb; });

    window.ctx = window.ctx || new AudioContext();
    await window.ctx.resume();

    if (!window.bb) {
        const c = `registerProcessor('bb', class extends AudioWorkletProcessor {
            constructor() { super(); this.t = 0; this.f = t => 0; this.d = 0.2;
                this.port.onmessage = e => { 
                    this.d=e.data.d;
                    try {let n=new Function('t','return '+e.data.f); n(0); this.f=n;} catch(x) { console.error(x) } 
                }
            }
            process(_, o) {
                let l=o[0][0];
                for (let i=0; i<l.length; i++) {
                    l[i] = ((this.f(this.t|0)&255)-128)/128;
                    this.t += this.d ;
                }
                return true;
            }
        })`;
        const u = URL.createObjectURL(new Blob([c], {type: 'application/javascript'}));
        await window.ctx.audioWorklet.addModule(u);
        window.bb = new AudioWorkletNode(window.ctx, 'bb', {outputChannelCount: [1]});
        window.bb.connect(window.ctx.destination);
    }
    window.bb.port.postMessage({f,d});
};

1. Run in browser console to inject bytebeat function
2. bytebeat("t>>3|(t>>42&t>>6)*t&t>>4+(t>>14&4)") // Run bytebeat
3. bytebeat("t>>3|(t>>20&t>>10)*t&t+(t>>14&4)") // Update live
4. bytebeat() // Shut down

If you try to run this when github page is open you will get error like "Refused to load the script ...". You need to open some other page and open console there. Either some random webpage (Most webpages do not block external scripts) or something running on localhost that is not blocking the script. Note: Start page will also block scripts, so you need to have some webpage open.