Responding to a tweet asking about possible new music in patch 1.09, No Man’s Sky Audio Chief Paul Weir revealed that the first content update will include audio changes:

Nope, no audio changes yet. There will be for our first content update.

After clarifying that the new music heard after 1.09 was due to the player visiting a blue system for the first time, Weir added that there’s no date for the first content update or the new music:

“New music is in the works, haven’t finalised exactly when it will make it into the game, but as soon as I can.”
“Just to be CLEAR, I’m not promising when the new music will go in, just as soon as we can. There will be new audio regardless.”

Hello Games is busy fixing bugs in No Man’s Sky, and once they’re done, they’ll begin adding new features to the game, including the ability to build bases and own giant space freighters. For the two latest PlayStation 4 bug fix updates – 1.08 and this week’s 1.09 – Hello Games has updated the Log portion of the official site with full patch notes. We’ve placed details of 1.08 below, with the 1.09 changes over here:

Patch 1.08

Fixes for loading save files that have become corrupted.
Fixes for several rare memory corruption bugs.
Fixes for several small memory leaks when warping.
Fix for loading from saves sometimes spawning you inside a building.
Fix for anisotropic filtering settings not working on some PCs (...