Universe started with hiss, not bang

The Universe began not with a bang but with a low moan, building into a roar that gave way to a deafening hiss. And those sounds gave birth to the first stars.

The big bang began in absolute silence. But the sound soon built up into a roar whose broad-peaked notes corresponded, in musical terms, to a "majestic" major third chord, evolving slowly into a "sadder" minor third, Whittle explained.

NewScientist.com