If you know where to look, music can be found just about everywhere, even in space. That’s right, space.
Astronomers know about sound waves coming from a couple of giant black holes. There’s the sucker that’s lurking at the centre of the M87 galaxy in the heart of a bunch of galaxies called the Virgo Cluster, some 50 million light-years away. You can’t hear them, obviously, because they’re so low on the scale that the waves themselves are spaced four million years apart, which means you get hit with the first wave and have to wait four million years for the next one to come along. That’s deep bass.
But if you want to go even deeper, there’s the sound coming from the Perseus cluster of galaxies. This could be the phattest bass note in the universe: B flat, 57 octaves below middle C.