[muxator]

Neat method. However, the frequency range for the device is 7600-13600 Hz: less than an octave.

[viraptor]

This is the first device of that kind. It's a research paper. The method described works. They weren't going for the limits of the technology here, but proving that it works. Others with different requirements of frequency ranges can create their own versions.

[xattt]

Terrible! I was expecting at least a 7599-13601 Hz split.

[sfink]

Ah, so you're pointing out that you could scale it up and down and stack them to convert white noise into chords? Cool!

[hinkley]

Make two of them mirror imaged to each other, and the middle of the audience hears the music in a different key than the wings.