Function decreaseTime

frontend/app/helpers/audio-helper.ts:361–371

()

  }

  function decreaseTime() {
    if (player) {
      player.getCurrentTime(seconds => {
        if (seconds - timeRate > 0) {
          seekToTime(seconds - timeRate);
        } else {
          seekToTime(0);
        }
      });
    }
  }

  const jumpSecond = (secondDelta: number) => {
    if (player) {