Function _fetchHeader

static/js/chunkedAudioEngine.js:172–176

(url)

  // --- fetch helpers ---

  async function _fetchHeader(url) {
    const res = await fetch(url, { headers: { Range: "bytes=0-1023" } });
    const buf = await res.arrayBuffer();
    return _parseWavHeader(buf);
  }

  async function _fetchPcm(stem, chunkIdx) {
    const { url, header } = stem;