text: function Filter(soundwave) {
    this._soundwave = soundwave
    this._upperLimit = 110
    this._lowerLimit = 90
  }
  
  Filter.prototype.setUpperLimit = function(limit) {
    this._upperLimit = limit
  }
  
  Filter.prototype.setLowerLimit = function(limit) {
    this._lowerLimit = limit
  }
  
  Filter.prototype.showSoundwave = function() {
    return this._soundwave
  }
  
  Filter.prototype.checkLevels = function() {
    for (var i = 0; i < this._soundwave.length; i++) {
      console.log(this._soundwave[i])
      if (this._soundwave[i] < this._lowerLimit) {
        this._soundwave[i] = this._lowerLimit
      } else if (this._soundwave[i] > this._upperLimit) {
        this._soundwave[i] = this._upperLimit
      }
    }
  }
  