Voices can be categorized as robotic and human voices. There are several robotic voices available for free download on this page. Robotic voices generate speech exclusivly by synthesis. Human voices are voices that are not entirely synthesized. They may be considered to have higher quality by certain users, depending on the intended use.

Robotic voices - free

Company Language Voices Download
Microsoft American English Sam, Maty & Mike Download - 7.3MB
Lernout & Hauspie British English Peter & Carol Download - 2.5MB
Lernout & Hauspie American English Several voices Download - 1MB*

* Included in the TTSReader installer. You shouldn't download this if you already downloaded the installable version of TTSReader.

 

Human voices - commercial

There are several companies offering human english voices. SpheNet is in no way associated with these companies, and cannot attest the quality of their products.

Company Website Samples, Demos
Acapela http://www.acapela-group.com/ Samples
Cepstral http://www.cepstral.com/ Demo
AT&T http://www.naturalvoices.att.com/ Demo
NeoSpeech http://www.neospeech.com/ Demo
Nuance - RealSpeak http://www.nuance.com/realspeak/ Unavailable