<p>Has anyone used the <a href="http://cmusphinx.sourceforge.net/html/cmusphinx.php" rel="nofollow noreferrer">Sphinx</a> speech recognition stack to build IVR applications?  I am looking for open source alternatives to the expensive and somewhat limiting choices from MSFT and others.  I have not been able to find a comprehensive package that ties open source speech/voip applications together.</p>

[{'answer_id': 37629, 'author': 'David Crow', 'author_id': 2783, 'author_profile': 'https://Stackoverflow.com/users/2783', 'pm_score': 2, 'selected': False, 'text': '<p>You could try integrating Sphinx with <a href="http://www.asterisk.org/" rel="nofollow noreferrer">Asterisk</a>:</p>\n\n<ul>\n<li><a href="http://www.syednetworks.com/asterisk-integration-with-sphinx-voice-recognition-system" rel="nofollow noreferrer">http://www.syednetworks.com/asterisk-integration-with-sphinx-voice-recognition-system</a></li>\n<li><a href="http://www.voip-info.org/wiki/view/Sphinx" rel="nofollow noreferrer">http://www.voip-info.org/wiki/view/Sphinx</a></li>\n</ul>\n'}, {'answer_id': 78591, 'author': 'bmdhacks', 'author_id': 14032, 'author_profile': 'https://Stackoverflow.com/users/14032', 'pm_score': 2, 'selected': True, 'text': '<p>\nLast I looked at Sphinx, it had issues with 8khz audio which resulted\nin really poor performance.  There\'s not a lot of people talking about\nsuccessful deployments of Sphinx in real environments, but you might\nbe able to get it to work with some trailblazing effort.  See here for\nmore info:\n</p>\n\n<p><a href="http://www.voip-info.org/wiki-Sphinx" rel="nofollow noreferrer"><a href="http://www.voip-info.org/wiki-Sphinx" rel="nofollow noreferrer">http://www.voip-info.org/wiki-Sphinx</a></a></p>\n\n<p>\nThe closest thing to open-source that really works is using LumenVox\nwith Asterisk.  Asterisk is the open-source PBX that you can use to\nintegrate with a VoIP service or gateway, or even the PSTN.  LumenVox\nis a commercial speech engine that integrates with Asterisk:\n</p>\n\n<p><a href="http://www.asterisk.org" rel="nofollow noreferrer"><a href="http://www.asterisk.org" rel="nofollow noreferrer">http://www.asterisk.org</a></a><br/>\n<a href="http://www.lumenvox.com" rel="nofollow noreferrer"><a href="http://www.lumenvox.com" rel="nofollow noreferrer">http://www.lumenvox.com</a></a><br/>\n<a href="http://www.lumenvox.com/partners/digium/Asterisk.aspx" rel="nofollow noreferrer"><a href="http://www.lumenvox.com/partners/digium/Asterisk.aspx" rel="nofollow noreferrer">http://www.lumenvox.com/partners/digium/Asterisk.aspx</a></a><br/></p>\n\n<p>\nThere\'s lots of people successfully using LumenVox with Asterisk.\n</p>\n'}]
['https://Stackoverflow.com/questions/36054', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/1219/']