February 12, 2004

The tuning of the universe, part 1

Ok, so here finally is a transposition of the CMB data into sound. It's not very pleasant and it's rough and unsophisticated. Sounds like a buzz saw.

I've taken the 2001 amplitudes and assumed a bandwidth of the entire audible spectrum. Seeing as how this spans 3 orders of magnitude, as does the measurement of angular resolution in the data, this seems fair enough. The frequencies then are worked out by slicing the range of 20 hertz to 20,000 hertz into 2001 bits.

I tried to put the data into Klank in SuperCollider but 2001 frequencies proved to much for it. In the end I had to settle for 251 to make it run so I kept every eighth amplitude and threw the rest away and sliced the frequency range by 251.

Klank is "a bank of fixed frequency resonators which can be used to simulate the resonant modes of an object. Each mode is given a ring time, which is the time for the mode to decay by 60 dB" - here then the idea is to think of the universe as an object with resonant modes as described by the CMB data and then give it a hefty clout to make it ring. The "clout" is provided by pink noise.

Listen here to :
CMB, peak frequency at 2251 hz (1 MB)
CMB, transposed,peak frequency at 9004 hz (0.9 MB)
CMB, transposed, peak frequency at 4520 hz plus CMB, transposed, with peak frequency at 9004 hz (0.75 MB)

Hopefully a more sophisticated approach will appear soon. Stay tuned . . . . and play it loud !

Posted by Jem Finer at February 12, 2004 3:31 PM