I've done a lot of work with the Watson Speech to Text service (I work on the Watson team), and I've been pretty impressed with the results. You can upload an a

I've done a lot of work with the Watson Speech to Text service (I work on the Watson team), and I've been pretty impressed with the results. You can upload an audio file (wav, flac, or ogg/opus) to the demo to try it out: https://speech-to-text-demo.mybluemix.net/ https://speech-to-text-demo.mybluemix.net/