This is a more in depth description of the properties of the planet that are making these sounds!

The winds of Jupiter are a thousand metres per second relative to the rotating interior. Jupiter’s magnetic field is four thousand times stronger than Earth’s, and is tipped by 11° degrees of axis spin. This causes the magnetic field to wobble, which has a profound effect on trapped electronically charged particles. This plasma of charged particles is accelerated beyond the magnetosphere of Jupiter to speeds of tens of thousands of kilometres per second. It is these magnetic particle vibrations which generate some of the sound you hear on this recording.

And in related news astronomers spotted an exoplanet that they describe as a “Super Jupiter”.  Studying that planet should help us understand gas giants a lot better than previously understood by astronomers.