Patch 6.15 Sound not working!

Just today (8th of August 2016) my client patched, after I already patched for patch 6.15, and after that all the sound no longer worked! I noticed it when I got into game, there was no music, no VFX or voice overs. Nothing! I alt-tabbed to check if my audio was turned off on my computer, first in general and then specifically for League of Legends, but it wasn't! There is no reason why the sound shouldn't work, and I have even tried repairing the client.

Please help!