Sounds a bit like some midi data loop is feedbacking where it shouldn't. Turned midi thru off in your keyboards settings?

If it's an USB audio device you're using; hickup stutters sound familiar to me, see picture below for adjustments, power management should be off in all USB hub drivers, and windows updates usually screws up these settings. Disable latter with something like Win Update Stop.

... static and crackling usually has to do with buffers, and if all USB data are running via just one controller chip can be a problem too ... F

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