The Lucent text-to-speech (TTS) engine allows many features of the voices to be modified. To modify properties of a Lucent TTS speaker:
From the Windows taskbar, choose Start ... Settings ... Control Panel.
In the Control Panel, open Lucent TTS Configuration.
A dialog will appear that shows Lucent TTS Properties. Note: this window does not show in the Windows taskbar and is easy to "lose" behind other windows. If the Lucent TTS Properties window cannot be located, minimize all other open windows to find it.
In the left pane of the window, click on the speaker to modify. The properties of the speaker will show in the right pane.
Verify that Sampling Rate is set correctly. For most voice modems and telephony cards (including Brooktrout), set to "8000". For most Dialogic cards, set to "11025."
Verify that Output Format is set correctly. For most voice modems and telephony cards (including Brooktrout), set to "PCM 16-bit sample signed". For most Dialogic cards, set to "8-bit Unsigned."
Do not modify the TTS Engine Server or Volume fields. Volume settings are defaulted to maximum and are suitable for telephony applications.
Do feel free to change the Age and Gender, or other engine properties located on the Engine Specific Properties tab.
Once finished making changes, click the Apply button to save the changes.
Press OK to close the Lucent TTS configuration applet.
Dynamically Modifying Voices at Run-Time
To modify speaker properties such as pace and pitch on the fly while processing Call Trees, refer to the section on Dynamically Customizing Speech Output.