Here is some more background on solar winds and the astrophysics taking place from wikipedia:

The solar wind is a stream of charged particles released from the upper atmosphere of the Sun. This plasma consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV; embedded in the solar-wind plasma is the interplanetary magnetic field. The solar wind varies in density, temperature and speed over time and over solar longitude. Its particles can escape the Sun’s gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.

The comments on the thread are very spirited.  Do you have any other theories or thoughts regarding these sounds?  Is it what you expected or totally different?

Feel free to comment on the things you hear in the video.