Question Installed ASRock b450m steel legend -audio crackly

Dec 23, 2019
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Hoping someone can help me and my son. We are complete novices but we managed to upgrade his pc to a new ASRock b450m steel legend with ryzen 5 3600x, 16gb g.skill ripsaws V ddr4 and gtx1060 graphics card.

amazingly the pc is working and running games fine but his audio is very quiet and crackly. I have no clue how to fix this and would be grateful for some advice on what we’ve done wrong and how to fix
 

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