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https://www.quora.com/Speech-Recognition/Which-is-the-best-open-source-ASR-for-non-commercial-usage-Is-HTK-still-be-best-given-its-long-history-and-rich-documen

• dharma1 11y ago
  This one looks promising too, although very early days. https://github.com/srvk/eesen https://github.com/srvk/eesen I think we'll see something state of the art (that runs on mobile devices pretty soon in the open source world. You also need a good microphone setup to get good quality speech in. Both Echo and Dot have a 7 mic array with beamforming, which helps a lot with far field speech recognition.