<div dir="ltr"><span style="font-size:13px">Lefteris,</span><div><span style="font-size:13px"><br></span></div><div><span style="font-size:13px">Thanks a lot for your detailed answer and for the valuable work you've been doing on this topic for quite some time now.</span><br></div><div><span style="font-size:13px"><br></span></div><div><span style="font-size:13px">Cheers,</span></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature">Philippe Sultan</div></div>
<br><div class="gmail_quote">2015-08-28 12:26 GMT+02:00 Lefteris Zafiris <span dir="ltr"><<a href="mailto:zaf.000@gmail.com" target="_blank">zaf.000@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Fri, 28 Aug 2015 12:11:14 +0300<br>
Amelye Chatila <<a href="mailto:amechax@gmail.com">amechax@gmail.com</a>> wrote:<br>
<br>
> I have a similar situation here, I want to include TTS in my asterisk IVR<br>
> system. Could someone give suggestion(s) please, I prefer open-source<br>
> thanks in advance!<br>
<br>
<br>
</span>Hello,<br>
<br>
what follows is a mostly incomplete list of Text To Speech (TTS) and Speech To Text (STT)<br>
solutions available for asterisk.<br>
<br>
-Regarding the TTS free and open source available options:<br>
<br>
Asterisk comes with festival (<a href="http://www.cstr.ed.ac.uk/projects/festival/" rel="noreferrer" target="_blank">http://www.cstr.ed.ac.uk/projects/festival/</a>) support<br>
(app_festival) already build in. Decent quality, supports mainly English.<br>
<br>
There is support for flite (<a href="http://www.festvox.org/flite/" rel="noreferrer" target="_blank">http://www.festvox.org/flite/</a>) available as a 3rd party<br>
plugin : <a href="http://zaf.github.io/Asterisk-Flite/" rel="noreferrer" target="_blank">http://zaf.github.io/Asterisk-Flite/</a> Quality at par with festival, much easier<br>
to setup and use, supports only English.<br>
<br>
Also support for espeak (<a href="http://espeak.sourceforge.net/" rel="noreferrer" target="_blank">http://espeak.sourceforge.net/</a>):<br>
<a href="http://zaf.github.io/Asterisk-eSpeak/" rel="noreferrer" target="_blank">http://zaf.github.io/Asterisk-eSpeak/</a> Average quality, supports a wide range of languages.<br>
<br>
<br>
-Free plugins/scripts that provide TTS from a remote not-so-free service:<br>
<br>
GoogleTTS : <a href="http://zaf.github.io/asterisk-googletts/" rel="noreferrer" target="_blank">http://zaf.github.io/asterisk-googletts/</a> Great quality, lots of languages,<br>
free of charge but NOT suitable for any serious/commercial use. It is not a service<br>
Google officially provides but just a hack that gets synthesized speech data from their<br>
translate page. It's more suitable for testing/developing and home use.<br>
<br>
MsTTS: <a href="http://zaf.github.io/asterisk-mstts/" rel="noreferrer" target="_blank">http://zaf.github.io/asterisk-mstts/</a> using Microsoft's Translator voice<br>
synthesis engine.<br>
<br>
iSpeech: <a href="http://zaf.github.io/asterisk-ispeech/" rel="noreferrer" target="_blank">http://zaf.github.io/asterisk-ispeech/</a> using iSpeech API (<a href="http://www.ispeech.org" rel="noreferrer" target="_blank">http://www.ispeech.org</a>)<br>
<br>
<br>
-Other non free solutions:<br>
<br>
Cepstral: <a href="http://www.cepstral.com/en/telephony/asterisk" rel="noreferrer" target="_blank">http://www.cepstral.com/en/telephony/asterisk</a><br>
<br>
Speech Technology Group: <a href="http://www.asteriskexchange.com/listings/1001" rel="noreferrer" target="_blank">http://www.asteriskexchange.com/listings/1001</a><br>
<br>
<br>
-Regarding the STT options:<br>
<br>
Google Speech: <a href="http://zaf.github.io/asterisk-speech-recog/" rel="noreferrer" target="_blank">http://zaf.github.io/asterisk-speech-recog/</a> the API is limited at the<br>
moment in something like 50 requests/day and considered a technology preview.<br>
<br>
iSpeech: <a href="http://zaf.github.io/asterisk-ispeech/" rel="noreferrer" target="_blank">http://zaf.github.io/asterisk-ispeech/</a><br>
<br>
Lumevox: <a href="http://www.lumenvox.com/partners/digium/asterisk.aspx" rel="noreferrer" target="_blank">http://www.lumenvox.com/partners/digium/asterisk.aspx</a><br>
<br>
Sphinx: <a href="http://cmusphinx.sourceforge.net/wiki/asteriskdetails" rel="noreferrer" target="_blank">http://cmusphinx.sourceforge.net/wiki/asteriskdetails</a><br>
<br>
Vestec: <a href="http://www.asteriskexchange.com/listings/113" rel="noreferrer" target="_blank">http://www.asteriskexchange.com/listings/113</a><br>
<br>
<br>
Regards,<br>
<br>
Lefteris Zafiris<br>
<div class="HOEnZb"><div class="h5"><br>
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