If you are a musician into sampling, Native Instruments has a reproduction of this very instrument that sounds incredible. However, the idea has been around for a while and there have been plenty of instruments that already do this, or methods to mute other strings so they don’t produce harmonics (which still happens with the traditional mute…you have to stick them in the strings).
That said, back in the days of uprights, there were a few full-length grand uprights where the strings were designed not to cross one another and thus elicit sympathetic harmonics from one another. Some went up, and others were built directly into their performance spaces so that the room was as much a part of the instrument as it was. It is amazing that in this day and age, someone is still doing this, but pianos used to be a lot more experimental than they are today with almost everything standardized within a few themes.
