8 Configuration
8.4 Voice Synthesis Configuration
8.4.2 Selecting the pitch of the spoken voice
To change the pitch of the text-to-speech, from the main menu go to Configuration (3) and select Speech configuration (4) /Pitch (2).
With the navigation keys choose the desired value and press Accept 
. Value range goes from 100 (very low) up to 300 (very high).
From this moment the text-to-speech will be configurated to the required pitch.