A few years ago Gibson began introducing some clever new technology to a select few guitars which automatically tuned the instrument and kept it there (seen most recently in the gorgeous Firebird X). I think that it's fair to say that robot tuning has not quite been a phenomenal success, perhaps due to the fact that tuning six strings only takes a few seconds and doesn't require any specialist training. That's certainly not true of the piano, which has more than 200 strings divided between 88 keys and its tuning is, for the most part, gratefully handed over to the experienced ear of a professional technician. In the 1990s, Kansas City mechanical engineer and classically-trained pianist Don A Gilmore created a mechanical self-tuning device for the piano. From there he went on to develop a thermal system that can bring the whole instrument to tune within a minute.
Read the full article: A closer look at Don Gilmore's self-tuning piano system