Because we are discussing the ways in which we can manipulate sound, here's a few others that you can change in your test project, if you see fit:
Changing the pitch in audio editing means changing the high or low tone that we hear in the track. Technically, this means that we are decreasing the time interval between the voice waves (which means that we are increasing frequency). In theory, if you do this, it will also increase the speed or tempo of the entire track. But with Audacity, you can change this pitch setting without changing the speed of your audio track because Audacity will re-adjust to maintain the original speed.
To change the pitch, follow the steps shown below: