multi-room music

My scenario is that I have a device in each room and they all have record players as well as other input devices. What I would love is for the grouped devices (all of them in my case) to switch to broadcasting to the rest from whichever one is receiving input to save me having to open the app to...

Have 3 echo dots and the Wiim Amp in one Alexa group. When starting playing music with an Alexa command everything is playing in sync without problems. After a while the Wiim Amp runs out of sync, Echo devices together are staying syncronized. The time delay between the Echos and the Wiim...