First, select an input sound clicking on "Select sound".
Then you can
- add this sound to database (click on "Add selected sound to database"
- perform speaker recognition (click on "Speaker Recognition" button)
Note: If you want to perform speaker recognition database has to include at least one sound.

If you choose to add sound to database, a positive integer (speaker ID) is required. This posivive integer is a progressive number which identifies a person (each person corresponds to a class).