WiFi interfering with bluetooth audio

wireless kubuntu 18.10 bluetooth-speaker

I just solved this problem (on Ubuntu 20.04) by buying a dual band router.

When I connect the notebook wifi in the 5GHz band together with my sound box in the notebook Bluetooth and play music videos in YouTube, everything works fine, with top performance.

The problem is that Bluetooth generates interference in the 2.4GHz wifi, as it also operates on this frequency, but does not affect the 5GHz band.

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