app.js

window.ctx = new AudioContext();
// ctx.suspend();

function URLFromFiles(files) {
    const promises = files.map((file) =>
      fetch(file).then((response) => response.text())
    );

    return Promise.all(promises).then((texts) => {
      const text = texts.join("");
      const blob = new Blob([text], { type: "application/javascript" });

      return URL.createObjectURL(blob);
    });
}

URLFromFiles(["./processor.js"]).then((e) => {
  if (ctx.audioWorklet === undefined) {
    log("No AudioWorklet.");
  } else {
    ctx.audioWorklet.addModule(e).then(() => {
        window.dataSAB = new SharedArrayBuffer(2048 * 4); // 4 is the byte lenth
        window.pointerSAB = new SharedArrayBuffer(2 * 4);
        window.writePtr = new Uint32Array(window.pointerSAB, 0, 1);
        window.readPtr = new Uint32Array(window.pointerSAB, 4, 1);
        const n = new AudioWorkletNode(ctx, "processor", {
            processorOptions: {
                dataSAB:  window.dataSAB,
                pointerSAB: window.pointerSAB,
                writePtr: window.writePtr,
                readPtr: window.readPtr,
            },
        });
      n.connect(ctx.destination);
    });
  }
});

window.audioStart = () => {
    ctx.resume();
}

window.audioStop = () => {
    ctx.suspend();
}