Ok, you can make it happen, so it will not rely on hearing people, but self-depend from deaf people. You say expensive license, what mean? Ya can make it happen, so when use it, it will hear the sound and convert into words. Same as tape recorder. But it is upgrade tape recorder, that cause words to be visual with time stamp. Well, I am sure tape recorder don't have time stamp and visual. So, it is upgrade with two input in it, time stamp and visual words, to make it happen. Like a tape is old fashion, so DVD is new fashion. A device for deaf people. Deaf people only create their own video and other stuff, but not convert already video to input closed caption. So, it is behind, way behind from audio.