det ((radio)I - A) = 0

I'd never seen this before, but perhaps you had. From the site:

Eigenradio plays only the most important frequencies, only the beats with the highest entropy. [...] Eigenradio makes its optimal music by analyzing in real time dozens of radio stations at once. When our bank of computers has heard enough music, it will go to work on making more just like it. Since we listen to so much music all the time, Eigenradio is always on and always live. What you hear on Eigenradio is the best of the New Music, distilled and de-correlated. One song on Eigenradio is worth at least twenty songs on old radio.

The process is explained here [pdf]. Be sure and check out the Singular Christmas mix. Neato.