How to make the sound play simultaneously in the bluetooth headphones and from the phone and computer on Windows 10?

Question

Bluetooth

Connected headphones to the computer and phone. But when music starts playing on the phone, it stays on the computer and vice versa. I want to hear sound from both the phone and the computer in bluetooth headphones at the same time

Answer 1

Bluetooth does not know how, only in turn.
You can only try to put a second bluetooth adapter on a computer and a program that would take the sound from one bluetooth adapter, mix it with the sound of Windows and transfer it to another bluetooth adapter.
It goes without saying that it will work and not be buggy.