WaveFileGenerator class generates a .wav file in main dirctory for a given frequency.
I have set the WaveFileGenerator class variables after going through these few links .
You could change the variables as per your need.
There's just 1 function in the WaveFileGenerator class i.e
public File getWavFile() //This returns the File object of the generated wave file.
If you run the app please look for "pathcheck" in your log to see the path of the generated wave file.