Re: Can earphones be paired with two sound-producers at the same time, like the pc and the phone?

In article <[email protected]>, Paul <[email protected]>
wrote:

> > So to turn off the built-in PC speakers I disabled them but no sound
> > comes from the Bose bluetooth hearphones even though they are still
> > listed as paired with the PC, although the phone also says that the
> > hearphones are paired with it!!!
> > 
> > Can they be listed as paired, either on the phone or the PC, but not
> > really be connected?  Or can speakers or earphones be paired with two
> > sound-producers at the same time, like the pc and the phone?   Will both
> > sounds come out at the same time, overlaying each other?      (The phone
> > isn't making any sound now anyhow, and I don't want to fiddle because
> > the medical clinic is supposed to call right back.)
> > 
> > 
> > And now I just got bu-dup bu-dap-dup in my ears and I don't know who
> > sent it or what it means.  Nothing on the PC screen or the phone gives a
> > clue. I thought maybe the hearphones were turning off but they haven't.
> > 
> >   the built in speakers are still there and they are now listed as the
> > default, and now that I got a phone call, removed the hearphones (which
> > turn themslves off if neither ear has one.)
> 
> One headset cannot listen to two PCs at the same time,

yes it can, known as bluetooth multipoint. 

more common is multipair, where a headset is paired with multiple
sources but can only connect to one at any given time. switching is
usually manual, without the need to re-pair. some can auto-switch to
whichever source has active audio, including airpods and galaxy buds.

> because each PC has its own spread spectrum frequency hopping
> pattern. It would take two radio chains, to do a good job in
> your proposed design. The easiest way to do it, would be
> for the headset to have two BT chips (one radio chain per chip)
> and mix the audio together from the output of the chips.

complete rubbish. 

> Of course, no one would build that, because the battery life would
> be affected.

yes they would, and have, and without any adverse effect on battery
life.