I'm working to build an IVR with asterisk and I'm looking to use a speech recognition API. Can I use Bing speech API for speech recognition in asterisk passing through asterisk API?
Speech recognition work bad with 8khz sound(you can't get more then 8khz in telephony connected to POTS). Best working is google,but accuracy is terrible.
You can use this library for example https://pypi.python.org/pypi/SpeechRecognition/
In asterisk you can use EAGI or Record app.