function determineUsingAnyFX() {
    var waveforms = document.querySelectorAll(".amplitude-wave-form");
    var visualizationElements = document.querySelectorAll(".amplitude-visualization");

    if (waveforms.length > 0 || visualizationElements.length > 0) {
      return true;
    } else {
      return false;
    }
  }
Determines if the user is using any of the web audio API features.