How do I Change to a Different Voice in my ECO2?
Pick a Voice
The ECO will be your voice. When people hear it before they see you, they will know it's you. You will want to pick a voice you like.
Select the TOOLS key 
at the top of your device.
In the Toolbox, select the SPEECH MENU.
ECO offers speech synthesizers for Acapela, RealSpeak, AT&T Natural Voices, and DECtalk.
The Synthesizer option allows you to select the synthesizer for the speech you want.
The Voice option allows you to select the voice you want. The Main Voice will be your voice. Note:If you are using an Acapela, AT&T, Scan Soft or Natural Speech main voice, you will select a DECtalk speech voice for auditory prompts.
To listen to any voice, tap the text area at the top of the touchscreen. ECO will speak any text on the display in the voice you selected.
You can change the sound of any voice by using the other options in the SPEECH MENU.
Important Note: Before you use the other options in the menu to change the sound of any voice, write down the default settings. That way, if you end up not liking any changes you have made, you will be able to return to the original voice.
When you have finished choosing a voice, select OK to exit the menu.