Sonus /so.nus/ - An open source, cross platform, decentralized, always-on speech recognition framework. Sonus is a speech to text library you can use to quickly and easally add a VUI (Voice User Interface) to any hardware or software project. Just like Alexa, Google Now, and Siri, Sonus is always listening offline for a customizable hotword. Once that hotword is detected your speech is streamed to the cloud recognition service of your choice - then you get the results.