function SawOsc(freq) {
    oscillator_classCallCheck(this, SawOsc);
    return _super3.call(this, freq, 'sawtooth');
  }
Constructor: <code>new p5.SawOsc()</code>.
 This creates a SawTooth Wave Oscillator and is
 equivalent to <code> new p5.Oscillator('sawtooth')
 </code> or creating a p5.Oscillator and then calling
 its method <code>setType('sawtooth')</code>.
 See p5.Oscillator for methods.

 @class  p5.SawOsc
 @constructor
 @extends p5.Oscillator
 @param {Number} [freq] Set the frequency