I cannot hear any music through my Speakers/headphones when I am editing music with my Audio Cleaning Lab 2013. I used to use Audio Cleaning Lab 17 before and I had no problem with it. When the using playback, the cursor is moving and the sound bars are moving up and down but there is no sound from my speakers/headphones. My computer has Windows 7Ultimate 64 bit operating system.
Go to your computer control panel, Hardware and Sound, Manage audio devices, Playback and check your settings. You probably want Speakers or Headphones. Also, check in the Volume Mixer that he speaker is on and the volume is up. I just had the same problem and the incorrect playback device was selected.