1. If the sound of the output wave file is distorted, the most possible reason is that the volume of sound card is too louder. There are two ways to resolve the problem.
Decrease the volume of the program.
Or click 
at the right bottom of Windows or the equivalent icon, decrease the volume of "Volume control" or "Wave".
2. If you can not hear the sound of the output wav file, please try to increase the recorder volume of the program, or increase the volume of "Volume control" or "Wave" of Windows.
3. When the program launches at the first time, it will automatically select an input device with "Wave Out Mix" as possible as it can, which might appear as "Stereo Mixer", "What U Hear", "Output", "Mixer", "Wave". If succeed, the input device list will hide. If not, it will show. please select the item manually.
