Optimal sound input level is crucial to speech recognition, so you must go through the setup process for each new microphone you associate with a profile.
To show the Microphone Setup window:
Choose Tools > Microphone Setup.
The Microphone Setup window will also appear automatically when you create a profile.
To adjust the sound input level automatically:
Click the microphone button at the upper right of the window and read aloud the text that appears in the middle of the window until the window informs you that the level is adjusted. You might have to read the entire text two or three times before the adjustment is completed. When adjustment is completed, the window will say “Finished” and the last few seconds of your speech will be played back.
To adjust the sound input level manually: