Annoying screen mirroring with Appletv

Hello,
The situation: i have just bought a Macbook and for quite some time already i have been a fan of using my AppleTV with my Ipad. Now, when sitting at home surfing and listening to music I prefer to use Spotify, Soundcloud etc with my Macbook. When i activate the ATV with the MB however, it always also mirrors my desktop screen to my television. When doing finances and stuff I prefer the ATV not to mirror my desktop activities.
Is there something like a method with which i can select only audio for the ATV?
Thank you for the reply!
Kind regards,
Peter

Hello, thank you for the reply!
I cannot select audio outputs however.. I've attached a screenshot to this email that hopefully clarifies.
Again, thanks.
Peter

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