ingame voice/music problem

Hello summoners. /sorry for my terrible english/ From patch 8.5 I have a problem (bug) with ingame voices and music. Every voice is too fast and sound like a comedy sketch. Every music or anonce sound is too laught and sound like a "triggered meme" xD ....indeed I try to fix it with client repair but not working... trying to wait for new patch but not working too. Any ideas??
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