ySelector(".audio-error");
								audioError.setAttribute("style", "");
							} else
								console.warn("synth error", error);
						});
					});
				} else {
					var audioError = document.querySelector(".audio-error");
					audioError.setAttribute("style", "");
				}
			}

			stopAudioButton.addEventListener("click", function() {
				startChordsButton.setAttribute("style", "");
				startMelodiesButton.setAttribute("style", "");
				startHarmonyButton.setAttribute("style", "");
				startMelodyButton.se