Thank you, both.
I've tried ASIO first, but unfortunately I wasn't able to get it working (cause I have no clue what's going on with all this different modes)
Switched to WASAPI/shared with a sampling rate of 48000.
This works fine with my bluetooth headphones SONY WH-1000XM3.
and..... no more crackling sound. Phantastic!
Maybe this post may help someone with a similar problem:
cakewalk, crackling noise, crackle, soundproblem, sampling rate 48.000, WASAPI
see pictures for setup
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Edit: (quote from member scook)
When sharing devices with Windows and Cbb make sure the sample rates are the same.
Above shows CbB is set to 48000.
Windows must be set to the same sample rate.
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Following posts are no longer relevant.
Reboot your PC at least once after changing settings ?
Best regards
Peter
Peter Stiens's post in PercX VS Cakewalk - crackling sound (finally solved) was marked as the answer