code: function fillFiveQuarterSineTable(tab, fftSize) {
    const tab_size = 5 * fftSize / 4;
    let step = 2 * Math.PI / fftSize;
  
    for (let i = 0; i <= tab_size; i++)
      tab[i] = Math.sin(i * step);
  
    return tab;
  }
docs: tab = Float32Array(5 / 4 * fftSize + 1) sine = *tab + 0 cosine = *tab + fftSize / 4