Bum bumbum bum bum. It's nice to have nice sound system rigdup. In my case I have a car stereo with bluethooth, bluetooth speaker and many other devices with wifi and spekers. YYY what? Phone/ tablet / laptop / every thing with web browser and working speaker will do!
All devices are on music sync site. Someone is becoming Me master! Selecting song from list and on all connected devices speakers are is use now, ~~sync and playing in union!
Bum bum.
It's creating interesting party delay / echo vibe.
All devices have different delay in processing to spitting out sound. Sometimes it's close to 5ms. But bluetooth speaker will do 300ms delay. So now every speaker in system hove Advanced ms per speaker :)
Or My delay on device to the relation of the rest.