In my experience people are VERY turned off by the free ones, such as 
those provided by festival and eSpeak. I even went to all the trouble of 
installing . We are planning to purchase cepstral voices for both 
english and spanish. Though they aren't the best voices available, they 
are much less expensive than something like AT&T natural voices. The 
redistribution license (note this is different from a concurrency 
license) and 3 voices costs something like $290 and the nice thing about 
cepstral is it supports SSML: http://www.w3.org/TR/speech-synthesis/ so 
you can easily control how the voice sounds. I even went to all the 
trouble of installing HTS voices: 
http://hts.sp.nitech.ac.jp/?Voice%20Demos with Festival and still could 
not get it to sound human because of the intonation issues with 
Festival. eSpeak has a much better intonation engine but the voices 
sound stifled and robotic and the HTS voices only work with Festival.

Josh Patten
Assistant Network Administrator
Brazos County IT Dept.
(979) 361-4676


On 4/20/2010 8:22 AM, Francis Tinio wrote:
> Hey.
>
> Just want some feedback on which company you guys use for IVR recordings?  We 
> currently have a live attendant configured but would be changing to IVR soon. 
>  Anyone care to share their thoughts on this?
>
> You use free IVR responses voice overs or professional paid?
>
> Thanks
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