I finally got speech recognition with Jasper working. I can say commands like "go", "left" or "stop" and the robot will drive or turn in that direction.  Or with the Jasper modules I can start a search in Wikipedia and the IMDB Movie database.

I began to write a little chat module for Jasper. So someone could ask the robot something and gets an answer.

I use the webcam microphone for speech input. I had to set the recording level to very low.

You have to turn it down until Jasper shows: "no disturbance detected" on silence. Then you have no "false" detected words on silence.