Hey there @Fumax,
Thanks for searching for the answer you need here!
Keep in mind that the behavior you've noticed is expected - there's a difference in the quality of sound on web player and desktop app.
We suggest you check this help page for more info.
Hope this helps. Let us know if you have any more questions.
IvanModerator
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“Music is the wine that fills the cup of silence.” - Robert Fripp