Gamemode game and Discord in background lead to cracking sound


I like to play DayZ very much, so I gave it a shot to install Steam and DayZ. It works relatively well. There is just one thing annoying me:

  1. While Discord is active and in the foreground, the sound is good.
  2. When switching to DayZ in foreground, the sound is cracking and bad and speech almost not understandable. This happens with gamemoderun discord, too.

What can I do?

Thank you in advance!